diff --git a/hw/xwin/winmultiwindowwndproc.c b/hw/xwin/winmultiwindowwndproc.c
index 8b2a1458a..7ebe42faa 100644
--- a/hw/xwin/winmultiwindowwndproc.c
+++ b/hw/xwin/winmultiwindowwndproc.c
@@ -647,10 +647,13 @@ winTopLevelWindowProc (HWND hwnd, UINT message,
       return winMouseButtonsHandle (s_pScreen, ButtonRelease, HIWORD(wParam) + 5, wParam);
 
     case WM_MOUSEWHEEL:
-      
-      /* Pass the message to the root window */
-      SendMessage (hwndScreen, message, wParam, lParam);
-      return 0;
+      if (SendMessage(hwnd, WM_NCHITTEST, 0, MAKELONG(GET_X_LPARAM(lParam), GET_Y_LPARAM(lParam))) == HTCLIENT)
+	{
+	  /* Pass the message to the root window */
+	  SendMessage (hwndScreen, message, wParam, lParam);
+	  return 0;
+	}
+      else break;
 
     case WM_SETFOCUS:
       if (s_pScreenPriv == NULL || s_pScreenInfo->fIgnoreInput)