diff --git a/src/network/leaseshelper.c b/src/network/leaseshelper.c
index e53a73c668a1a9c5bacf79ba0e84b34d377cf165..b6f6c32b507b28e19c00497ca52fd113e92a9fe7 100644
--- a/src/network/leaseshelper.c
+++ b/src/network/leaseshelper.c
@@ -25,6 +25,7 @@
 
 #include <config.h>
 
+#include <locale.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <sys/stat.h>