diff --git a/package/libnl-tiny/src/include/netlink-local.h b/package/libnl-tiny/src/include/netlink-local.h
index a311ec051a..a2000fa2ff 100644
--- a/package/libnl-tiny/src/include/netlink-local.h
+++ b/package/libnl-tiny/src/include/netlink-local.h
@@ -11,6 +11,7 @@
 
 #ifndef NETLINK_LOCAL_H_
 #define NETLINK_LOCAL_H_
+#define _GNU_SOURCE
 
 #include <stdio.h>
 #include <errno.h>