diff --git a/win32ss/user/ntuser/ntstubs.c b/win32ss/user/ntuser/ntstubs.c
index f182d4fa30c..a4c7f214044 100644
--- a/win32ss/user/ntuser/ntstubs.c
+++ b/win32ss/user/ntuser/ntstubs.c
@@ -918,9 +918,8 @@ NtUserCtxDisplayIOCtl(
 BOOL APIENTRY
 NtUserLockWindowUpdate(HWND hWnd)
 {
-   STUB
-
-   return 0;
+    STUB;
+    return FALSE;
 }
 
 DWORD APIENTRY