diff --git a/worldedit-core/src/main/java/com/fastasyncworldedit/core/anvil/MCAChunk.java b/worldedit-core/src/main/java/com/fastasyncworldedit/core/anvil/MCAChunk.java
index 551cd2483..ff5f1c9ec 100644
--- a/worldedit-core/src/main/java/com/fastasyncworldedit/core/anvil/MCAChunk.java
+++ b/worldedit-core/src/main/java/com/fastasyncworldedit/core/anvil/MCAChunk.java
@@ -1052,10 +1052,11 @@ public class MCAChunk implements IChunk {
     }
 
     @Override
-    public void setCreateCopy(final boolean createCopy) {
+    public int setCreateCopy(final boolean createCopy) {
         if (createCopy) {
             throw new UnsupportedOperationException("Not supported in Anvil queue mode.");
         }
+        return -1;
     }
 
     @Override