diff --git a/dlls/user32/tests/msg.c b/dlls/user32/tests/msg.c
index 62acf8ae63d..8c23da26f6a 100644
--- a/dlls/user32/tests/msg.c
+++ b/dlls/user32/tests/msg.c
@@ -13054,6 +13054,7 @@ static LRESULT CALLBACK KeyboardHookProc(int nCode, WPARAM wParam, LPARAM lParam
     {
         KBDLLHOOKSTRUCT *kdbhookstruct = (KBDLLHOOKSTRUCT*)lParam;
 
+        msg.hwnd = 0;
         msg.message = wParam;
         msg.flags = kbd_hook|wparam|lparam;
         msg.wParam = kdbhookstruct->vkCode;