diff --git a/reactos/dll/win32/syssetup/classinst.c b/reactos/dll/win32/syssetup/classinst.c
index 21d20d4f5e9..8e043211426 100644
--- a/reactos/dll/win32/syssetup/classinst.c
+++ b/reactos/dll/win32/syssetup/classinst.c
@@ -8,7 +8,7 @@
 
 #include "precomp.h"
 
-//#define NDEBUG
+#define NDEBUG
 #include <debug.h>
 
 /*