diff --git a/isisd/isis_mt.h b/isisd/isis_mt.h
index 2952a2f171..d431d34a08 100644
--- a/isisd/isis_mt.h
+++ b/isisd/isis_mt.h
@@ -27,6 +27,7 @@
 #define ISIS_MT_AT_MASK        0x4000
 
 #define ISIS_MT_IPV4_UNICAST   0
+#define ISIS_MT_STANDARD ISIS_MT_IPV4_UNICAST
 #define ISIS_MT_IPV4_MGMT      1
 #define ISIS_MT_IPV6_UNICAST   2
 #define ISIS_MT_IPV4_MULTICAST 3