diff --git a/common/constant/key.go b/common/constant/key.go
index cd23dd0f1ad3e000fe54c251d9563bcf12ba86c7..29a306f0e4b2a3184e34e6a9dfac88f1855f1e43 100644
--- a/common/constant/key.go
+++ b/common/constant/key.go
@@ -171,6 +171,10 @@ const (
 	ETCDV3_KEY = "etcdv3"
 )
 
+const (
+	CONSUL_KEY = "consul"
+)
+
 const (
 	TRACING_REMOTE_SPAN_CTX = "tracing.remote.span.ctx"
 )