diff --git a/reactos/include/wine/debugtools.h b/reactos/include/wine/debugtools.h
index 7abbf01e71c..a1146a8c66e 100644
--- a/reactos/include/wine/debugtools.h
+++ b/reactos/include/wine/debugtools.h
@@ -11,7 +11,7 @@
 
 #include <windows.h>
 
-#endif __NTDLL__
+#endif /* __NTDLL__ */
 
 struct _GUID;