diff --git a/source3/web/neg_lang.c b/source3/web/neg_lang.c
index 09eff7ea08c..c415449d091 100644
--- a/source3/web/neg_lang.c
+++ b/source3/web/neg_lang.c
@@ -21,6 +21,7 @@
 #include "includes.h"
 #include "web/swat_proto.h"
 #include "intl/lang_tdb.h"
+#include "system/filesys.h"
 
 /*
   during a file download we first check to see if there is a language