diff --git a/src/core/framelesshelper_win.cpp b/src/core/framelesshelper_win.cpp
index 0ba2f120..845dffb5 100644
--- a/src/core/framelesshelper_win.cpp
+++ b/src/core/framelesshelper_win.cpp
@@ -464,6 +464,10 @@ bool FramelessHelperWin::nativeEventFilter(const QByteArray &eventType, void *me
             }
         }
         muData.mouseLeaveBlocked = false;
+    } else if (uMsg == WM_SIZE) {
+        if (wParam == SIZE_MAXIMIZED) {
+            SEND_MESSAGE(hWnd, WM_MOUSEMOVE, HTCLIENT, MAKELPARAM(-999, -999));
+        }
     }
 
     switch (uMsg) {