diff --git a/src/main/java/appeng/container/slot/AppEngSlot.java b/src/main/java/appeng/container/slot/AppEngSlot.java
index fa069f9c..89e337e4 100644
--- a/src/main/java/appeng/container/slot/AppEngSlot.java
+++ b/src/main/java/appeng/container/slot/AppEngSlot.java
@@ -79,7 +79,7 @@ public class AppEngSlot extends Slot
 
 	public void clearStack()
 	{
-		ItemHandlerUtil.setStackInSlot( this.itemHandler, this.slotNumber, ItemStack.EMPTY );
+		ItemHandlerUtil.setStackInSlot( this.itemHandler, this.index, ItemStack.EMPTY );
 	}
 
 	@Override