diff --git a/src/main/java/appeng/client/gui/AEBaseGui.java b/src/main/java/appeng/client/gui/AEBaseGui.java
index 8c46b3c2..71abe2d3 100644
--- a/src/main/java/appeng/client/gui/AEBaseGui.java
+++ b/src/main/java/appeng/client/gui/AEBaseGui.java
@@ -372,7 +372,7 @@ public abstract class AEBaseGui extends GuiContainer
 
 		if( slot instanceof SlotFake )
 		{
-			final InventoryAction action = mouseButton == 1 ? InventoryAction.SPLIT_OR_PLACE_SINGLE : InventoryAction.PICKUP_OR_SET_DOWN;
+			final InventoryAction action = ctrlDown == 1 ? InventoryAction.SPLIT_OR_PLACE_SINGLE : InventoryAction.PICKUP_OR_SET_DOWN;
 
 			if( this.drag_click.size() > 1 )
 			{