diff --git a/ot_http.c b/ot_http.c
index af3f210..5c622e2 100644
--- a/ot_http.c
+++ b/ot_http.c
@@ -4,9 +4,9 @@
    $id$ */
 
 /* System */
+#define _GNU_SOURCE
 #include <arpa/inet.h>
 #include <pthread.h>
-#define _GNU_SOURCE
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>