diff --git a/includes/dhcp.h b/includes/dhcp.h
index 2beff21a..b1132a53 100644
--- a/includes/dhcp.h
+++ b/includes/dhcp.h
@@ -154,6 +154,8 @@ struct dhcp_packet {
 #define DHO_DHCP_REBINDING_TIME		59
 #define DHO_VENDOR_CLASS_IDENTIFIER	60
 #define DHO_DHCP_CLIENT_IDENTIFIER	61
+#define DHO_NWIP_DOMAIN_NAME		62
+#define DHO_NWIP_SUBOPTIONS		63
 #define DHO_USER_CLASS			77
 #define DHO_DHCP_AGENT_OPTIONS		82
 /* The DHO_AUTHENTICATE option is not a standard yet, so I've