diff --git a/src/main/java/appeng/container/slot/AppEngSlot.java b/src/main/java/appeng/container/slot/AppEngSlot.java
index 2921c63e1..9b09b41f5 100644
--- a/src/main/java/appeng/container/slot/AppEngSlot.java
+++ b/src/main/java/appeng/container/slot/AppEngSlot.java
@@ -120,7 +120,7 @@ public class AppEngSlot extends Slot
 	{
 		if( this.isSlotEnabled() )
 		{
-			ItemHandlerUtil.setStackInSlot( this.itemHandler, this.index, stack.copy() );
+			ItemHandlerUtil.setStackInSlot( this.itemHandler, this.index, stack );
 
 			if( this.getContainer() != null )
 			{
diff --git a/src/main/java/appeng/tile/inventory/AppEngInternalInventory.java b/src/main/java/appeng/tile/inventory/AppEngInternalInventory.java
index 80bfa6481..f228f858e 100644
--- a/src/main/java/appeng/tile/inventory/AppEngInternalInventory.java
+++ b/src/main/java/appeng/tile/inventory/AppEngInternalInventory.java
@@ -77,11 +77,10 @@ public class AppEngInternalInventory extends ItemStackHandler implements Iterabl
 	@Override
 	public void setStackInSlot( int slot, @Nonnull ItemStack stack )
 	{
-		if( stack == this.getStackInSlot( slot ) )
+		if( stack != this.getStackInSlot( slot ) )
 		{
-			return;
+			this.previousStack = this.getStackInSlot( slot ).copy();
 		}
-		this.previousStack = this.getStackInSlot( slot ).copy();
 		super.setStackInSlot( slot, stack );
 	}