diff --git a/ospfd/ospf_network.h b/ospfd/ospf_network.h
index 1b43df1..f690991 100644
--- a/ospfd/ospf_network.h
+++ b/ospfd/ospf_network.h
@@ -34,5 +34,6 @@
 				     unsigned int);
 extern int ospf_if_ipmulticast (struct ospf *, struct prefix *, unsigned int);
 extern int ospf_sock_init (void);
+extern void ospf_adjust_sndbuflen (struct ospf *, int);
 
 #endif /* _ZEBRA_OSPF_NETWORK_H */