diff --git a/Servers/WindowServer/WindowManager.h b/Servers/WindowServer/WindowManager.h
index 85611f400a..0c7ec8429f 100644
--- a/Servers/WindowServer/WindowManager.h
+++ b/Servers/WindowServer/WindowManager.h
@@ -233,6 +233,8 @@ private:
             m_left = {};
             m_right = {};
             m_middle = {};
+            m_back = {};
+            m_forward = {};
         }
 
         WeakPtr<Window> m_clicked_window;