diff --git a/src/plugins/platforms/windows/qwindowsmousehandler.h b/src/plugins/platforms/windows/qwindowsmousehandler.h
index b3bfa033808..caf30e6b1a4 100644
--- a/src/plugins/platforms/windows/qwindowsmousehandler.h
+++ b/src/plugins/platforms/windows/qwindowsmousehandler.h
@@ -109,6 +109,8 @@ Qt::KeyboardModifiers QWindowsMouseHandler::keyStateToModifiers(int wParam)
       mods |= Qt::ControlModifier;
     if (wParam & MK_SHIFT)
       mods |= Qt::ShiftModifier;
+    if (GetKeyState(VK_MENU) < 0)
+      mods |= Qt::AltModifier;
     return mods;
 }