diff --git a/README.md b/README.md
index d46f69a..0269e83 100644
--- a/README.md
+++ b/README.md
@@ -148,6 +148,7 @@ make it work with JUnit 5. Feel free to use the code (in package ```de.platon42.
 
 - Enhancement: `opt` and several other directives (`printt`, `fail` etc.) no longer causes a syntax error when unquoted.
 - Enhancement: `include`, `incdir` and `incbin` and `output` with `<pathname>` quotes no longer cause syntax error.
+- New: Files in `include` directives can be referenced and renamed/refactored.
 
 ### V0.5 (06-Aug-21)
 
diff --git a/build.gradle b/build.gradle
index 518aba7..a459569 100644
--- a/build.gradle
+++ b/build.gradle
@@ -60,7 +60,8 @@ patchPluginXml {
   <h4>V0.6 (unreleased)</h4>
     <ul>
       <li>Enhancement: 'opt' and several other directives ('printt', 'fail' etc.) no longer causes a syntax error when unquoted.
-      <li<Enhancement: 'include', 'incdir' and 'incbin' and 'output' with '&lt;pathname&gt;' quotes no longer cause syntax error.
+      <li>Enhancement: 'include', 'incdir' and 'incbin' and 'output' with '&lt;pathname&gt;' quotes no longer cause syntax error.
+      <li>New: Files in 'include' directives can be referenced and renamed/refactored.
     </ul>
   <h4>V0.5 (06-Aug-21)</h4>
     <ul>
diff --git a/src/main/gen/de/platon42/intellij/plugins/m68k/parser/M68kParser.java b/src/main/gen/de/platon42/intellij/plugins/m68k/parser/M68kParser.java
index df6a287..0e5b698 100644
--- a/src/main/gen/de/platon42/intellij/plugins/m68k/parser/M68kParser.java
+++ b/src/main/gen/de/platon42/intellij/plugins/m68k/parser/M68kParser.java
@@ -817,8 +817,7 @@ public class M68kParser implements PsiParser, LightPsiParser {
     }
 
     /* ********************************************************** */
-    // Label? PreprocessorKeyword
-    //         PreprocessorOperands?
+    // Label? PreprocessorKeyword PreprocessorOperands?
     public static boolean PreprocessorDirective(PsiBuilder b, int l) {
         if (!recursion_guard_(b, l, "PreprocessorDirective")) return false;
         boolean r;
diff --git a/src/main/gen/de/platon42/intellij/plugins/m68k/psi/impl/M68kPreprocessorDirectiveImpl.java b/src/main/gen/de/platon42/intellij/plugins/m68k/psi/impl/M68kPreprocessorDirectiveImpl.java
index f4b5db5..fba03a7 100644
--- a/src/main/gen/de/platon42/intellij/plugins/m68k/psi/impl/M68kPreprocessorDirectiveImpl.java
+++ b/src/main/gen/de/platon42/intellij/plugins/m68k/psi/impl/M68kPreprocessorDirectiveImpl.java
@@ -1,7 +1,6 @@
 // This is a generated file. Not intended for manual editing.
 package de.platon42.intellij.plugins.m68k.psi.impl;
 
-import com.intellij.extapi.psi.ASTWrapperPsiElement;
 import com.intellij.lang.ASTNode;
 import com.intellij.psi.PsiElementVisitor;
 import com.intellij.psi.util.PsiTreeUtil;
@@ -11,7 +10,7 @@ import org.jetbrains.annotations.Nullable;
 
 import java.util.List;
 
-public class M68kPreprocessorDirectiveImpl extends ASTWrapperPsiElement implements M68kPreprocessorDirective {
+public class M68kPreprocessorDirectiveImpl extends M68kPreprocessorDirectiveMixin implements M68kPreprocessorDirective {
 
     public M68kPreprocessorDirectiveImpl(@NotNull ASTNode node) {
         super(node);
diff --git a/src/main/java/de/platon42/intellij/plugins/m68k/m68k.bnf b/src/main/java/de/platon42/intellij/plugins/m68k/m68k.bnf
index 0e5a720..306e37d 100644
--- a/src/main/java/de/platon42/intellij/plugins/m68k/m68k.bnf
+++ b/src/main/java/de/platon42/intellij/plugins/m68k/m68k.bnf
@@ -175,8 +175,9 @@ AsmOp ::= MNEMONIC OperandSize? {
 
 PreprocessorKeyword ::= (DATA_DIRECTIVE | OTHER_DIRECTIVE)
 
-PreprocessorDirective ::= Label? PreprocessorKeyword
-        PreprocessorOperands?
+PreprocessorDirective ::= Label? PreprocessorKeyword PreprocessorOperands? {
+    mixin = "de.platon42.intellij.plugins.m68k.psi.M68kPreprocessorDirectiveMixin"
+}
 
 MacroPlainLine ::= MACRO_LINE
 MacroNameDefinition ::= MACRO_NAME
diff --git a/src/main/java/de/platon42/intellij/plugins/m68k/psi/M68kElementFactory.kt b/src/main/java/de/platon42/intellij/plugins/m68k/psi/M68kElementFactory.kt
index 0d08f76..8f09100 100644
--- a/src/main/java/de/platon42/intellij/plugins/m68k/psi/M68kElementFactory.kt
+++ b/src/main/java/de/platon42/intellij/plugins/m68k/psi/M68kElementFactory.kt
@@ -37,6 +37,11 @@ object M68kElementFactory {
         return PsiTreeUtil.findChildOfType(file, M68kMacroCall::class.java)!!
     }
 
+    fun createIncludeStatement(project: Project, path: String): M68kPreprocessorDirective {
+        val file = createFile(project, " include \"$path\"\n")
+        return PsiTreeUtil.findChildOfType(file, M68kPreprocessorDirective::class.java)!!
+    }
+
     fun createFile(project: Project, content: String): M68kFile {
         return PsiFileFactory.getInstance(project).createFileFromText("dummy.m68k", INSTANCE, content) as M68kFile
     }
diff --git a/src/main/java/de/platon42/intellij/plugins/m68k/psi/M68kPreprocessorDirectiveMixin.kt b/src/main/java/de/platon42/intellij/plugins/m68k/psi/M68kPreprocessorDirectiveMixin.kt
new file mode 100644
index 0000000..96f0ffe
--- /dev/null
+++ b/src/main/java/de/platon42/intellij/plugins/m68k/psi/M68kPreprocessorDirectiveMixin.kt
@@ -0,0 +1,13 @@
+package de.platon42.intellij.plugins.m68k.psi
+
+import com.intellij.extapi.psi.ASTWrapperPsiElement
+import com.intellij.lang.ASTNode
+import com.intellij.psi.PsiReference
+import com.intellij.psi.impl.source.resolve.reference.ReferenceProvidersRegistry
+
+abstract class M68kPreprocessorDirectiveMixin(node: ASTNode) : ASTWrapperPsiElement(node), M68kPreprocessorDirective {
+
+    override fun getReferences(): Array<PsiReference> {
+        return ReferenceProvidersRegistry.getReferencesFromProviders(this)
+    }
+}
\ No newline at end of file
diff --git a/src/main/java/de/platon42/intellij/plugins/m68k/refs/M68kIncludeFileReference.kt b/src/main/java/de/platon42/intellij/plugins/m68k/refs/M68kIncludeFileReference.kt
new file mode 100644
index 0000000..08a0554
--- /dev/null
+++ b/src/main/java/de/platon42/intellij/plugins/m68k/refs/M68kIncludeFileReference.kt
@@ -0,0 +1,46 @@
+package de.platon42.intellij.plugins.m68k.refs
+
+import com.intellij.psi.*
+import com.intellij.psi.impl.source.resolve.ResolveCache
+import com.intellij.psi.search.FileTypeIndex
+import com.intellij.psi.search.GlobalSearchScope
+import de.platon42.intellij.plugins.m68k.M68kFileType
+import de.platon42.intellij.plugins.m68k.lexer.LexerUtil
+import de.platon42.intellij.plugins.m68k.psi.M68kPreprocessorDirective
+
+class M68kIncludeFileReference(element: M68kPreprocessorDirective) : PsiPolyVariantReferenceBase<M68kPreprocessorDirective>(element, true) {
+
+    companion object {
+        val INSTANCE = Resolver()
+    }
+
+    class Resolver : ResolveCache.PolyVariantResolver<M68kIncludeFileReference> {
+        override fun resolve(ref: M68kIncludeFileReference, incompleteCode: Boolean): Array<ResolveResult> {
+            val project = ref.element.project
+            val allFiles = FileTypeIndex.getFiles(M68kFileType.INSTANCE, GlobalSearchScope.allScope(project))
+
+            val pathName = LexerUtil.unquoteString(ref.element.exprList.first().text).replace('\\', '/')
+            val fileMatched = ((allFiles.firstOrNull { it.path.equals(pathName, ignoreCase = true) }
+                ?: allFiles.firstOrNull { it.path.endsWith(pathName.removePrefix("../"), ignoreCase = true) })
+                ?: allFiles.firstOrNull { it.path.endsWith(pathName.substringAfterLast('/'), ignoreCase = true) }) ?: return emptyArray()
+            return PsiElementResolveResult.createResults(PsiManager.getInstance(project).findFile(fileMatched))
+        }
+    }
+
+    override fun multiResolve(incompleteCode: Boolean): Array<ResolveResult> =
+        ResolveCache.getInstance(element.project)
+            .resolveWithCaching(this, INSTANCE, false, incompleteCode)
+
+    override fun resolve(): PsiElement? = multiResolve(false).singleOrNull()?.element
+
+    override fun getVariants(): Array<Any> = emptyArray()
+
+//    override fun getRangeInElement(): TextRange {
+//        val unquoted = LexerUtil.unquoteString(element.text)
+//
+//        val path = element.exprList.first()
+//        return TextRange.from(
+//            path.textRange.startOffset + path.text.indexOf(unquoted), unquoted.length
+//        )
+//    }
+}
\ No newline at end of file
diff --git a/src/main/java/de/platon42/intellij/plugins/m68k/refs/M68kPreprocessorDirectiveElementManipulator.kt b/src/main/java/de/platon42/intellij/plugins/m68k/refs/M68kPreprocessorDirectiveElementManipulator.kt
new file mode 100644
index 0000000..69ae3d8
--- /dev/null
+++ b/src/main/java/de/platon42/intellij/plugins/m68k/refs/M68kPreprocessorDirectiveElementManipulator.kt
@@ -0,0 +1,34 @@
+package de.platon42.intellij.plugins.m68k.refs
+
+import com.intellij.history.core.Paths
+import com.intellij.openapi.util.TextRange
+import com.intellij.psi.AbstractElementManipulator
+import com.intellij.psi.util.PsiTreeUtil
+import com.intellij.util.IncorrectOperationException
+import de.platon42.intellij.plugins.m68k.lexer.LexerUtil
+import de.platon42.intellij.plugins.m68k.psi.M68kElementFactory
+import de.platon42.intellij.plugins.m68k.psi.M68kLiteralExpr
+import de.platon42.intellij.plugins.m68k.psi.M68kPreprocessorDirective
+
+class M68kPreprocessorDirectiveElementManipulator : AbstractElementManipulator<M68kPreprocessorDirective>() {
+
+    @Throws(IncorrectOperationException::class)
+    override fun handleContentChange(element: M68kPreprocessorDirective, range: TextRange, newContent: String): M68kPreprocessorDirective {
+        val oldPath = LexerUtil.unquoteString(element.exprList.first().text)
+            .replace('\\', '/')
+            .substringBeforeLast('/', missingDelimiterValue = "")
+        val newIncludeStatement = M68kElementFactory.createIncludeStatement(element.project, Paths.appended(oldPath, newContent))
+        PsiTreeUtil.findChildOfType(element, M68kLiteralExpr::class.java)!!.replace(newIncludeStatement.exprList.first())
+        return element
+    }
+
+    override fun getRangeInElement(element: M68kPreprocessorDirective): TextRange {
+        val pathExpr = element.exprList.first()
+        val unquotedPath = LexerUtil.unquoteString(pathExpr.text)
+        return if (unquotedPath.length < pathExpr.textLength) {
+            TextRange.from(pathExpr.startOffsetInParent + 1, unquotedPath.length)
+        } else {
+            pathExpr.textRangeInParent
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/main/java/de/platon42/intellij/plugins/m68k/refs/M68kReferenceContributor.kt b/src/main/java/de/platon42/intellij/plugins/m68k/refs/M68kReferenceContributor.kt
index 307cb61..3efb543 100644
--- a/src/main/java/de/platon42/intellij/plugins/m68k/refs/M68kReferenceContributor.kt
+++ b/src/main/java/de/platon42/intellij/plugins/m68k/refs/M68kReferenceContributor.kt
@@ -3,7 +3,9 @@ package de.platon42.intellij.plugins.m68k.refs
 import com.intellij.patterns.PlatformPatterns
 import com.intellij.psi.*
 import com.intellij.util.ProcessingContext
+import de.platon42.intellij.plugins.m68k.psi.M68kLiteralExpr
 import de.platon42.intellij.plugins.m68k.psi.M68kMacroCall
+import de.platon42.intellij.plugins.m68k.psi.M68kPreprocessorDirective
 import de.platon42.intellij.plugins.m68k.psi.M68kSymbolReference
 
 class M68kReferenceContributor : PsiReferenceContributor() {
@@ -12,12 +14,14 @@ class M68kReferenceContributor : PsiReferenceContributor() {
         val localLabelReferenceProvider = LocalLabelReferenceProvider()
         val globalLabelReferenceProvider = GlobalLabelSymbolReferenceProvider()
         val macroReferenceProvider = MacroReferenceProvider()
+        val includeFileReferenceProvider = IncludeFileReferenceProvider()
     }
 
     override fun registerReferenceProviders(registrar: PsiReferenceRegistrar) {
         registrar.registerReferenceProvider(PlatformPatterns.psiElement(M68kSymbolReference::class.java), localLabelReferenceProvider)
         registrar.registerReferenceProvider(PlatformPatterns.psiElement(M68kSymbolReference::class.java), globalLabelReferenceProvider)
         registrar.registerReferenceProvider(PlatformPatterns.psiElement(M68kMacroCall::class.java), macroReferenceProvider)
+        registrar.registerReferenceProvider(PlatformPatterns.psiElement(M68kPreprocessorDirective::class.java), includeFileReferenceProvider)
     }
 
     class LocalLabelReferenceProvider : PsiReferenceProvider() {
@@ -40,4 +44,16 @@ class M68kReferenceContributor : PsiReferenceContributor() {
         override fun getReferencesByElement(element: PsiElement, context: ProcessingContext): Array<PsiReference> =
             arrayOf(M68kMacroReference(element as M68kMacroCall))
     }
+
+    class IncludeFileReferenceProvider : PsiReferenceProvider() {
+        override fun getReferencesByElement(element: PsiElement, context: ProcessingContext): Array<PsiReference> {
+            val directive = element as M68kPreprocessorDirective
+            if (directive.exprList.firstOrNull() !is M68kLiteralExpr) return emptyArray()
+            return if (directive.preprocessorKeyword.text.equals("include", ignoreCase = true)) {
+                arrayOf(M68kIncludeFileReference(directive))
+            } else {
+                emptyArray()
+            }
+        }
+    }
 }
diff --git a/src/main/java/de/platon42/intellij/plugins/m68k/scanner/M68kFindUsagesProvider.kt b/src/main/java/de/platon42/intellij/plugins/m68k/scanner/M68kFindUsagesProvider.kt
index 8bf2e6d..09c9420 100644
--- a/src/main/java/de/platon42/intellij/plugins/m68k/scanner/M68kFindUsagesProvider.kt
+++ b/src/main/java/de/platon42/intellij/plugins/m68k/scanner/M68kFindUsagesProvider.kt
@@ -1,5 +1,6 @@
 package de.platon42.intellij.plugins.m68k.scanner
 
+import com.intellij.lang.HelpID
 import com.intellij.lang.cacheBuilder.DefaultWordsScanner
 import com.intellij.lang.cacheBuilder.WordsScanner
 import com.intellij.lang.findUsages.FindUsagesProvider
@@ -22,14 +23,19 @@ class M68kFindUsagesProvider : FindUsagesProvider {
             TokenSet.EMPTY
         )
 
-    override fun canFindUsagesFor(psiElement: PsiElement): Boolean = psiElement is M68kNamedElement
+    override fun canFindUsagesFor(psiElement: PsiElement): Boolean =
+        when (psiElement) {
+            is M68kNamedElement, is M68kSymbolReference, is M68kMacroCall, is M68kFile, is M68kRegister -> true
+            else -> false
+        }
 
-    override fun getHelpId(psiElement: PsiElement): @NonNls String? = null
+    override fun getHelpId(psiElement: PsiElement): @NonNls String = HelpID.FIND_OTHER_USAGES
 
     override fun getType(element: PsiElement): @Nls String {
         return when (element) {
             is M68kGlobalLabel -> "global label"
             is M68kLocalLabel -> "local label"
+            is M68kPreprocessorDirective -> "preprocessor directive"
             is M68kSymbolDefinition -> "symbol definition"
             is M68kSymbolReference -> "symbol reference"
             is M68kMacroDefinition -> "macro definition"
@@ -44,6 +50,7 @@ class M68kFindUsagesProvider : FindUsagesProvider {
         return when (element) {
             is M68kGlobalLabel -> element.name!!
             is M68kLocalLabel -> element.name!!
+            is M68kPreprocessorDirective -> element.text
             is M68kSymbolDefinition -> element.parent.text
             is M68kSymbolReference -> element.symbolName
             is M68kMacroDefinition -> element.macroNameDefinition.text
diff --git a/src/main/java/de/platon42/intellij/plugins/m68k/scanner/M68kIncludeFileProvider.kt b/src/main/java/de/platon42/intellij/plugins/m68k/scanner/M68kIncludeFileProvider.kt
index 35aa042..b5e64db 100644
--- a/src/main/java/de/platon42/intellij/plugins/m68k/scanner/M68kIncludeFileProvider.kt
+++ b/src/main/java/de/platon42/intellij/plugins/m68k/scanner/M68kIncludeFileProvider.kt
@@ -45,7 +45,7 @@ class M68kIncludeFileProvider : FileIncludeProvider() {
             }
             .mapNotNull {
                 val pathNode = LightTreeUtil.firstChildOfType(tree, it.second, M68kTypes.LITERAL_EXPR) ?: return@mapNotNull null
-                val path = LexerUtil.unquoteString(LightTreeUtil.toFilteredString(tree, pathNode, null)).replace("\\", "/")
+                val path = LexerUtil.unquoteString(LightTreeUtil.toFilteredString(tree, pathNode, null)).replace('\\', '/')
                 if (it.first.equals("include", true)) {
                     FileIncludeInfo(path)
                 } else {
diff --git a/src/main/resources/META-INF/plugin.xml b/src/main/resources/META-INF/plugin.xml
index 2baf78a..50eae19 100644
--- a/src/main/resources/META-INF/plugin.xml
+++ b/src/main/resources/META-INF/plugin.xml
@@ -33,6 +33,8 @@
                                  implementationClass="de.platon42.intellij.plugins.m68k.refs.M68kSymbolReferenceElementManipulator"/>
         <lang.elementManipulator forClass="de.platon42.intellij.plugins.m68k.psi.M68kMacroCall"
                                  implementationClass="de.platon42.intellij.plugins.m68k.refs.M68kMacroCallElementManipulator"/>
+        <lang.elementManipulator forClass="de.platon42.intellij.plugins.m68k.psi.M68kPreprocessorDirective"
+                                 implementationClass="de.platon42.intellij.plugins.m68k.refs.M68kPreprocessorDirectiveElementManipulator"/>
         <lang.documentationProvider language="MC68000"
                                     implementationClass="de.platon42.intellij.plugins.m68k.documentation.M68kSymbolDefinitionDocumentationProvider"/>
         <lang.documentationProvider language="MC68000"
diff --git a/src/test/java/de/platon42/intellij/plugins/m68k/refs/M68kReferenceContributorTest.kt b/src/test/java/de/platon42/intellij/plugins/m68k/refs/M68kReferenceContributorTest.kt
index cbf0f9e..943f3d6 100644
--- a/src/test/java/de/platon42/intellij/plugins/m68k/refs/M68kReferenceContributorTest.kt
+++ b/src/test/java/de/platon42/intellij/plugins/m68k/refs/M68kReferenceContributorTest.kt
@@ -2,6 +2,8 @@ package de.platon42.intellij.plugins.m68k.refs
 
 import com.intellij.codeInsight.lookup.LookupElementBuilder
 import com.intellij.psi.PsiElement
+import com.intellij.psi.search.FilenameIndex
+import com.intellij.psi.search.GlobalSearchScope
 import com.intellij.testFramework.fixtures.CodeInsightTestFixture
 import de.platon42.intellij.jupiter.LightCodeInsightExtension
 import de.platon42.intellij.jupiter.MyFixture
@@ -86,4 +88,44 @@ internal class M68kReferenceContributorTest : AbstractM68kTest() {
 
         myFixture.checkResultByFile("macros_after_rename.asm")
     }
+
+    @Test
+    internal fun reference_to_file_can_be_renamed(@MyFixture myFixture: CodeInsightTestFixture) {
+        myFixture.addFileToProject("otherfile.asm", "; oh no!")
+        val file = myFixture.configureByText(
+            "fileref.asm", """
+ include "otherfil<caret>e.asm"
+        """
+        )
+        val reference = file.findReferenceAt(myFixture.editor.caretModel.offset)
+        assertThat(reference).isInstanceOf(M68kIncludeFileReference::class.java)
+        val otherfile = reference!!.resolve() as M68kFile
+        assertThat(otherfile.text).isEqualTo("; oh no!")
+
+        myFixture.renameElementAtCaret("foobar.asm")
+        val files = FilenameIndex.getFilesByName(myFixture.project, "foobar.asm", GlobalSearchScope.allScope(myFixture.project))
+        assertThat(files).hasSize(1)
+
+        assertThat(file.text).isEqualToIgnoringWhitespace("include \"foobar.asm\"")
+    }
+
+    @Test
+    internal fun reference_to_file_in_a_subdirectory_can_be_renamed(@MyFixture myFixture: CodeInsightTestFixture) {
+        myFixture.addFileToProject("foobar/otherfile.asm", "; oh no!")
+        val file = myFixture.configureByText(
+            "fileref.asm", """
+ include "foobar/otherfil<caret>e.asm"
+        """
+        )
+        val reference = file.findReferenceAt(myFixture.editor.caretModel.offset)
+        assertThat(reference).isInstanceOf(M68kIncludeFileReference::class.java)
+        val otherfile = reference!!.resolve() as M68kFile
+        assertThat(otherfile.text).isEqualTo("; oh no!")
+
+        myFixture.renameElementAtCaret("foobar.asm")
+        val files = FilenameIndex.getFilesByName(myFixture.project, "foobar.asm", GlobalSearchScope.allScope(myFixture.project))
+        assertThat(files).hasSize(1)
+
+        assertThat(file.text).isEqualToIgnoringWhitespace("include \"foobar/foobar.asm\"")
+    }
 }
\ No newline at end of file