diff --git a/contrib/bsnmp/snmp_mibII/snmp_mibII.3 b/contrib/bsnmp/snmp_mibII/snmp_mibII.3
index 36653e6484c8..09a91453252d 100644
--- a/contrib/bsnmp/snmp_mibII/snmp_mibII.3
+++ b/contrib/bsnmp/snmp_mibII/snmp_mibII.3
@@ -31,7 +31,7 @@
 .\"
 .\" $Begemot: bsnmp/snmp_mibII/snmp_mibII.3,v 1.10 2005/10/04 08:46:52 brandt_h Exp $
 .\"
-.Dd October 4, 2005
+.Dd January 4, 2017
 .Dt SNMP_MIBII 3
 .Os
 .Sh NAME
@@ -63,6 +63,8 @@
 .Sh LIBRARY
 .Pq begemotSnmpdModulePath."mibII" = "@MODPATH@snmp_mibII.so"
 .Sh SYNOPSIS
+.In net/if.h
+.In net/if_mib.h
 .In bsnmp/snmpmod.h
 .In bsnmp/snmp_mibII.h
 .Ft typedef void