diff --git a/bgpd/bgp_snmp.h b/bgpd/bgp_snmp.h
index a8af032..60daf0f 100644
--- a/bgpd/bgp_snmp.h
+++ b/bgpd/bgp_snmp.h
@@ -18,6 +18,11 @@
 Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
 02111-1307, USA.  */
 
+#ifndef _QUAGGA_BGP_SNMP_H
+#define _QUAGGA_BGP_SNMP_H
+
 void bgp_snmp_init ();
 void bgpTrapEstablished (struct peer *);
 void bgpTrapBackwardTransition (struct peer *);
+
+#endif /* _QUAGGA_BGP_SNMP_H */