diff --git a/core/script_language.h b/core/script_language.h
index 8c59a9e6b85..f4956accd34 100644
--- a/core/script_language.h
+++ b/core/script_language.h
@@ -246,7 +246,7 @@ public:
 	virtual void set_request_scene_tree_message_func(RequestSceneTreeMessageFunc p_func, void *p_udata) {}
 
 	ScriptDebugger();
-	virtual ~ScriptDebugger() {}
+	virtual ~ScriptDebugger() {singleton=NULL;}
 
 };