diff --git a/ospfd/ospf_lsa.h b/ospfd/ospf_lsa.h
index 02fbe70..4303bcd 100644
--- a/ospfd/ospf_lsa.h
+++ b/ospfd/ospf_lsa.h
@@ -323,4 +323,8 @@
 int metric_type (u_char);
 int metric_value (u_char);
 
+#ifdef HAVE_NSSA
+struct in_addr ospf_get_nssa_ip (struct ospf_area *);
+#endif
+
 #endif /* _ZEBRA_OSPF_LSA_H */