diff --git a/reactos/win32ss/user/winsrv/concfg/settings.c b/reactos/win32ss/user/winsrv/concfg/settings.c
index 0b5787639c2..58808259825 100644
--- a/reactos/win32ss/user/winsrv/concfg/settings.c
+++ b/reactos/win32ss/user/winsrv/concfg/settings.c
@@ -36,6 +36,7 @@
 #include "settings.h"
 
 #include <stdio.h> // for swprintf
+#include <strsafe.h>
 
 #define NDEBUG
 #include <debug.h>