diff --git a/ospfd/ospf_vty.h b/ospfd/ospf_vty.h
index da0ed1c..0602fec 100644
--- a/ospfd/ospf_vty.h
+++ b/ospfd/ospf_vty.h
@@ -53,5 +53,6 @@
 /* Prototypes. */
 extern void ospf_vty_init (void);
 extern void ospf_vty_show_init (void);
+extern int ospf_str2area_id (const char *, struct in_addr *, int *);
 
 #endif /* _QUAGGA_OSPF_VTY_H */