diff --git a/src/main/java/de/platon42/intellij/plugins/m68k/refs/M68kLocalLabelReference.kt b/src/main/java/de/platon42/intellij/plugins/m68k/refs/M68kLocalLabelReference.kt
index 473dc24..e7a492e 100644
--- a/src/main/java/de/platon42/intellij/plugins/m68k/refs/M68kLocalLabelReference.kt
+++ b/src/main/java/de/platon42/intellij/plugins/m68k/refs/M68kLocalLabelReference.kt
@@ -6,6 +6,7 @@ import com.intellij.psi.PsiElement
 import com.intellij.psi.PsiElementResolveResult
 import com.intellij.psi.PsiPolyVariantReferenceBase
 import com.intellij.psi.ResolveResult
+import com.intellij.psi.impl.source.resolve.ResolveCache
 import com.intellij.psi.util.PsiTreeUtil
 import com.intellij.util.SmartList
 import de.platon42.intellij.plugins.m68k.psi.M68kGlobalLabel
@@ -15,12 +16,45 @@ import de.platon42.intellij.plugins.m68k.psi.M68kSymbolReference
 
 class M68kLocalLabelReference(element: M68kSymbolReference) : PsiPolyVariantReferenceBase<M68kSymbolReference>(element, TextRange(0, element.textLength)) {
 
-    override fun multiResolve(incompleteCode: Boolean): Array<ResolveResult> {
-        val refName = myElement.symbolName
+    companion object {
+        val INSTANCE = Resolver()
 
-        return findLocalLabels { it.name == refName }
-            .map { PsiElementResolveResult(it) }
-            .toTypedArray()
+        fun findLocalLabels(element: M68kSymbolReference, predicate: (M68kLocalLabel) -> Boolean): List<M68kLocalLabel> {
+            val statement = PsiTreeUtil.getStubOrPsiParentOfType(element, M68kStatement::class.java)!!
+            val results: MutableList<M68kLocalLabel> = SmartList()
+            // go backward
+            var currentStatement = PsiTreeUtil.getPrevSiblingOfType(statement, M68kStatement::class.java)
+            while (currentStatement != null) {
+                val child = currentStatement.firstChild
+                if (child is M68kGlobalLabel) break
+                if (child is M68kLocalLabel && predicate.invoke(child)) results.add(child)
+                currentStatement = PsiTreeUtil.getPrevSiblingOfType(currentStatement, M68kStatement::class.java)
+            }
+            // go forward
+            currentStatement = statement
+            while (currentStatement != null) {
+                val child = currentStatement.firstChild
+                if (child is M68kGlobalLabel) break
+                if (child is M68kLocalLabel && predicate.invoke(child)) results.add(child)
+                currentStatement = PsiTreeUtil.getNextSiblingOfType(currentStatement, M68kStatement::class.java)
+            }
+            return results
+        }
+    }
+
+    class Resolver : ResolveCache.PolyVariantResolver<M68kLocalLabelReference> {
+        override fun resolve(ref: M68kLocalLabelReference, incompleteCode: Boolean): Array<ResolveResult> {
+            val refName = ref.element.symbolName
+
+            return findLocalLabels(ref.myElement) { it.name == refName }
+                .map { PsiElementResolveResult(it) }
+                .toTypedArray()
+        }
+    }
+
+    override fun multiResolve(incompleteCode: Boolean): Array<ResolveResult> {
+        return ResolveCache.getInstance(element.project)
+            .resolveWithCaching(this, INSTANCE, false, incompleteCode)
     }
 
     override fun resolve(): PsiElement? {
@@ -29,30 +63,10 @@ class M68kLocalLabelReference(element: M68kSymbolReference) : PsiPolyVariantRefe
     }
 
     override fun getVariants(): Array<Any> {
-        return findLocalLabels { true }
+        return findLocalLabels(element) { true }.asSequence()
+            .distinct()
             .map { LookupElementBuilder.createWithIcon(it) }
+            .toList()
             .toTypedArray()
     }
-
-    private fun findLocalLabels(predicate: (M68kLocalLabel) -> Boolean): List<M68kLocalLabel> {
-        val statement = PsiTreeUtil.getStubOrPsiParentOfType(element, M68kStatement::class.java)!!
-        val results: MutableList<M68kLocalLabel> = SmartList()
-        // go backward
-        var currentStatement = PsiTreeUtil.getPrevSiblingOfType(statement, M68kStatement::class.java)
-        while (currentStatement != null) {
-            val child = currentStatement.firstChild
-            if (child is M68kGlobalLabel) break
-            if (child is M68kLocalLabel && predicate.invoke(child)) results.add(child)
-            currentStatement = PsiTreeUtil.getPrevSiblingOfType(currentStatement, M68kStatement::class.java)
-        }
-        // go forward
-        currentStatement = statement
-        while (currentStatement != null) {
-            val child = currentStatement.firstChild
-            if (child is M68kGlobalLabel) break
-            if (child is M68kLocalLabel && predicate.invoke(child)) results.add(child)
-            currentStatement = PsiTreeUtil.getNextSiblingOfType(currentStatement, M68kStatement::class.java)
-        }
-        return results
-    }
 }
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