diff --git a/src/main/java/slimeknights/mantle/inventory/SmartItemHandlerSlot.java b/src/main/java/slimeknights/mantle/inventory/SmartItemHandlerSlot.java
index b01c75f07..32051668e 100644
--- a/src/main/java/slimeknights/mantle/inventory/SmartItemHandlerSlot.java
+++ b/src/main/java/slimeknights/mantle/inventory/SmartItemHandlerSlot.java
@@ -12,6 +12,6 @@ public SmartItemHandlerSlot(IItemHandler itemHandler, int index, int xPosition,
 
 	@Override
 	public int getMaxStackSize(ItemStack stack) {
-		return getItemHandler().getSlotLimit(getSlotIndex());
+		return Math.min(stack.getMaxStackSize(), getItemHandler().getSlotLimit(getSlotIndex()));
 	}
 }