diff --git a/classlib/java.base/src/main/java/de/mirkosertic/bytecoder/classlib/MemoryManager.java b/classlib/java.base/src/main/java/de/mirkosertic/bytecoder/classlib/MemoryManager.java
index e274c9124..6b99f6ef9 100644
--- a/classlib/java.base/src/main/java/de/mirkosertic/bytecoder/classlib/MemoryManager.java
+++ b/classlib/java.base/src/main/java/de/mirkosertic/bytecoder/classlib/MemoryManager.java
@@ -246,6 +246,9 @@ public static boolean isUsedByHeapUserSpace(final int aPtrToObject) {
         return false;
     }
 
+    @Export("isUsedAsCallback")
+    public static native boolean isUsedAsCallback(final int aPtr);
+
     @Export("GC")
     public static int GC() {
         return IncrementalGC(Integer.MAX_VALUE);
@@ -269,7 +272,7 @@ public static int IncrementalGC(final int blockLimit) {
             final int theNext = Address.getIntValue(theCurrent, 4);
             final int theSurvivorCount = Address.getIntValue(theCurrent, 8);
             if (currentEpoch % theSurvivorCount == 0) {
-                if (!isUsedByHeap(theCurrent) && !isUsedByStack(theCurrent)) {
+                if (!isUsedByHeap(theCurrent) && !isUsedByStack(theCurrent) && (!isUsedAsCallback(theCurrent + 12))) {
                     internalFree(theCurrent);
                     freeCounter++;
                 } else {
diff --git a/core/src/main/java/de/mirkosertic/bytecoder/backend/wasm/WASMSSAASTCompilerBackend.java b/core/src/main/java/de/mirkosertic/bytecoder/backend/wasm/WASMSSAASTCompilerBackend.java
index f1d12572d..39a1bd36a 100644
--- a/core/src/main/java/de/mirkosertic/bytecoder/backend/wasm/WASMSSAASTCompilerBackend.java
+++ b/core/src/main/java/de/mirkosertic/bytecoder/backend/wasm/WASMSSAASTCompilerBackend.java
@@ -1408,6 +1408,7 @@ public Function resolveCallsiteBootstrapFor(final BytecodeClass owningClass, fin
             theWriter.println("     runningInstanceMemory: undefined,");
             theWriter.println("     exports: undefined,");
             theWriter.println("     referenceTable: ['EMPTY'],");
+            theWriter.println("     callbacks: [],");
             theWriter.println("     filehandles: [],");
             theWriter.println();
 
@@ -1572,6 +1573,12 @@ public Function resolveCallsiteBootstrapFor(final BytecodeClass owningClass, fin
             theWriter.println("     },");
             theWriter.println();
 
+            theWriter.println("     registerCallback: function(ptr,callback) {");
+            theWriter.println("         bytecoder.callbacks.push(ptr);");
+            theWriter.println("         return callback;");
+            theWriter.println("     },");
+            theWriter.println();
+
             theWriter.println("     imports: {");
             theWriter.println("         stringutf16: {");
             theWriter.println("             isBigEndian: function() {return 1;},");
@@ -1583,14 +1590,13 @@ public Function resolveCallsiteBootstrapFor(final BytecodeClass owningClass, fin
             theWriter.println("         vm: {");
             theWriter.println("             newRuntimeGeneratedTypeStringMethodTypeMethodHandleObject: function() {},");
             theWriter.println("         },");
-            theWriter.println("         printstream: {");
-            theWriter.println("             logDebug: function(caller, value) {bytecoder.logDebug(caller,value);},");
-            theWriter.println("         },");
             theWriter.println("         memorymanager: {");
             theWriter.println("             logExceptionTextString : function(thisref, p1) {");
             theWriter.println("                 console.log('Exception with message : ' + bytecoder.toJSString(p1));");
             theWriter.println("             },");
-
+            theWriter.println("             isUsedAsCallbackINT : function(thisref, ptr) {");
+            theWriter.println("                 return bytecoder.callbacks.includes(ptr);");
+            theWriter.println("             },");
             theWriter.println("             printObjectDebugInternalObjectINTINTBOOLEANBOOLEAN: function(thisref, ptr, indexAlloc, indexFree, usedByStack, usedByHeap) {");
             theWriter.println("                 console.log('Memory debug for ' + ptr);");
             theWriter.println("                 var theAllocatedBlock = ptr - 12;");
@@ -1608,7 +1614,6 @@ public Function resolveCallsiteBootstrapFor(final BytecodeClass owningClass, fin
             theWriter.println("                     console.log(' Memory offset +' + i + ' = ' + bytecoder.intInMemory( theAllocatedBlock + i));");
             theWriter.println("                 }");
             theWriter.println("             }");
-
             theWriter.println("         },");
             theWriter.println("         opaquearrays : {");
             theWriter.println("             createIntArrayINT: function(thisref, p1) {");
@@ -1901,7 +1906,9 @@ public Function resolveCallsiteBootstrapFor(final BytecodeClass owningClass, fin
                                     }
                                     final BytecodeMethod theImpl = theCallbackMethods.get(0);
 
-                                    theWriter.print("function (");
+                                    theWriter.print("bytecoder.registerCallback(arg");
+                                    theWriter.print(i);
+                                    theWriter.print(",function (");
                                     for (int j=0;j<theImpl.getSignature().getArguments().length;j++) {
                                         if (j>0) {
                                             theWriter.print(",");
@@ -1975,7 +1982,7 @@ public Function resolveCallsiteBootstrapFor(final BytecodeClass owningClass, fin
                                         }
                                     }
 
-                                    theWriter.print("}");
+                                    theWriter.print("})");
                                 } else {
                                     throw new IllegalStateException("Type conversion from " + theRef.name() + " is not supported!");
                                 }
diff --git a/integrationtest/src/main/java/de/mirkosertic/bytecoder/integrationtest/VueDemo.java b/integrationtest/src/main/java/de/mirkosertic/bytecoder/integrationtest/VueDemo.java
index 00dfee6a4..9bbd286c9 100644
--- a/integrationtest/src/main/java/de/mirkosertic/bytecoder/integrationtest/VueDemo.java
+++ b/integrationtest/src/main/java/de/mirkosertic/bytecoder/integrationtest/VueDemo.java
@@ -30,23 +30,17 @@ public interface MyVueInstance extends VueInstance {
         void welcomemessage(final String aNewMessage);
     }
 
-    private static VueEventListener<MyVueInstance, ClickEvent> listener;
-
     public static void main(final String[] args) {
 
-        // We need the static reference to avoid garbage collection for this object
-        // Opaque References are NOT visible to the GC, hence all references it holds also!!!
-        listener = new VueEventListener<MyVueInstance, ClickEvent>() {
+        final VueBuilder<MyVueInstance> theBuilder = Vue.builder();
+        theBuilder.bindToTemplateSelector("#vuetemplate");
+        theBuilder.data().setProperty("welcomemessage", "hello world!");
+        theBuilder.addEventListener("clicked", new VueEventListener<MyVueInstance, ClickEvent>() {
             @Override
             public void handle(final MyVueInstance instance, final ClickEvent event) {
                 instance.welcomemessage(String.format("hello world, you have clicked. Timestamp is %s", System.currentTimeMillis()));
             }
-        };
-
-        final VueBuilder<MyVueInstance> theBuilder = Vue.builder();
-        theBuilder.bindToTemplateSelector("#vuetemplate");
-        theBuilder.data().setProperty("welcomemessage", "hello world!");
-        theBuilder.addEventListener("clicked", listener);
+        });
         MyVueInstance instance = theBuilder.build();
     }
 }