diff --git a/src/listener.c b/src/listener.c
index afd6ae225..e5e723f45 100644
--- a/src/listener.c
+++ b/src/listener.c
@@ -10,6 +10,7 @@
  *
  */
 
+#define _GNU_SOURCE
 #include <errno.h>
 #include <stdio.h>
 #include <string.h>