diff --git a/lib/sockopt.h b/lib/sockopt.h
index 65ba34f..ebb7143 100644
--- a/lib/sockopt.h
+++ b/lib/sockopt.h
@@ -23,6 +23,8 @@
 #define _ZEBRA_SOCKOPT_H
 
 extern int setsockopt_so_recvbuf (int sock, int size);
+extern int setsockopt_so_sendbuf (const int sock, int size);
+extern int getsockopt_so_sendbuf (const int sock);
 
 #ifdef HAVE_IPV6
 extern int setsockopt_ipv6_pktinfo (int, int);