diff --git a/bgpd/bgp_network.h b/bgpd/bgp_network.h
index 7bcd25a..ddf050d 100644
--- a/bgpd/bgp_network.h
+++ b/bgpd/bgp_network.h
@@ -21,8 +21,8 @@
 #ifndef _QUAGGA_BGP_NETWORK_H
 #define _QUAGGA_BGP_NETWORK_H
 
-int bgp_socket (struct bgp *, unsigned short);
-int bgp_connect (struct peer *);
-void bgp_getsockname (struct peer *);
+extern int bgp_socket (struct bgp *, unsigned short);
+extern int bgp_connect (struct peer *);
+extern void bgp_getsockname (struct peer *);
 
 #endif /* _QUAGGA_BGP_NETWORK_H */