diff --git a/sbin/dhclient/dhclient.c b/sbin/dhclient/dhclient.c
--- a/sbin/dhclient/dhclient.c
+++ b/sbin/dhclient/dhclient.c
@@ -2641,6 +2641,8 @@
 	case DHO_DHCP_USER_CLASS_ID:
 	case DHO_URL:
 	case DHO_SIP_SERVERS:
+	case DHO_V_I_VENDOR_CLASS:
+	case DHO_V_I_VENDOR_OPTS:
 	case DHO_END:
 		return (1);
 	case DHO_CLASSLESS_ROUTES:
diff --git a/sbin/dhclient/dhcp.h b/sbin/dhclient/dhcp.h
--- a/sbin/dhclient/dhcp.h
+++ b/sbin/dhclient/dhcp.h
@@ -174,6 +174,8 @@
 #define	DHO_DOMAIN_SEARCH		119
 #define DHO_SIP_SERVERS			120
 #define DHO_CLASSLESS_ROUTES		121
+#define DHO_V_I_VENDOR_CLASS		124
+#define DHO_V_I_VENDOR_OPTS		125
 #define DHO_END				255
 
 /* DHCP message types. */