diff --git a/reactos/subsys/win32k/ntuser/window.c b/reactos/subsys/win32k/ntuser/window.c
index b2911d9a20e..f83c638a117 100644
--- a/reactos/subsys/win32k/ntuser/window.c
+++ b/reactos/subsys/win32k/ntuser/window.c
@@ -1173,7 +1173,7 @@ NtUserBuildHwndList(
     if(!(W32Thread = Thread->Tcb.Win32Thread))
     {
       ObDereferenceObject(Thread);
-      DPRINT1("Thread is not a GUI Thread!\n");
+      DPRINT("Thread is not a GUI Thread!\n");
       SetLastWin32Error(ERROR_INVALID_PARAMETER);
       return 0;
     }