diff --git a/Assets/Patterns/9. Update/Custom Update method/Scripts/GameController.cs b/Assets/Patterns/9. Update/Custom Update method/Scripts/GameController.cs
index a737caa..f5dc36c 100644
--- a/Assets/Patterns/9. Update/Custom Update method/Scripts/GameController.cs	
+++ b/Assets/Patterns/9. Update/Custom Update method/Scripts/GameController.cs	
@@ -63,7 +63,7 @@ public static void RegisterUpdateableObject(IUpdateable obj)
         //Unregister
         public static void UnregisterUpdateableObject(IUpdateable obj)
         {
-            if (!updateableObjects.Contains(obj))
+            if (updateableObjects.Contains(obj))
             {
                 updateableObjects.Remove(obj);
             }