diff --git a/lib/log.h b/lib/log.h
index 69919b4..8948ea0 100644
--- a/lib/log.h
+++ b/lib/log.h
@@ -47,6 +47,7 @@
   ZLOG_OSPF,
   ZLOG_RIPNG,  
   ZLOG_OSPF6,
+  ZLOG_ISIS,
   ZLOG_MASC
 } zlog_proto_t;