diff --git a/src/main/java/appeng/parts/automation/StackUpgradeInventory.java b/src/main/java/appeng/parts/automation/StackUpgradeInventory.java
index fcf0418ed..2e45f6fa4 100644
--- a/src/main/java/appeng/parts/automation/StackUpgradeInventory.java
+++ b/src/main/java/appeng/parts/automation/StackUpgradeInventory.java
@@ -19,6 +19,7 @@ public class StackUpgradeInventory extends UpgradeInventory
 		this.stack = stack;
 	}
 
+	@Override
 	public int getMaxInstalled( Upgrades upgrades )
 	{
 		int max = 0;