diff --git a/util/fusermount.c b/util/fusermount.c
index b90c520..bd2b2e1 100644
--- a/util/fusermount.c
+++ b/util/fusermount.c
@@ -7,6 +7,8 @@
 */
 /* This program does the mounting and unmounting of FUSE filesystems */

+#define _GNU_SOURCE
+
 #include <config.h>

 #include "mount_util.h"