diff --git a/Advanced Software Engineering/Advanced Software Engineering/Drawer.cs b/Advanced Software Engineering/Advanced Software Engineering/Drawer.cs
index d882dbe..660e8d5 100644
--- a/Advanced Software Engineering/Advanced Software Engineering/Drawer.cs	
+++ b/Advanced Software Engineering/Advanced Software Engineering/Drawer.cs	
@@ -198,6 +198,7 @@ namespace Advanced_Software_Engineering {
         }
 
         public bool CheckVariableExists(string name) {
+            if (name == null) return false;
             return variables.ContainsKey(name);
         }
     }