diff --git a/common/constant/key.go b/common/constant/key.go
index 1479af2305b1ce4280c2aa7f4016e314ac358513..d9413fcc9e24a857cdb398cc6fb96074ffef31b4 100644
--- a/common/constant/key.go
+++ b/common/constant/key.go
@@ -223,6 +223,7 @@ const (
 	KEY_SEPARATOR      = ":"
 	DEFAULT_PATH_TAG   = "metadata"
 	KEY_REVISON_PREFIX = "revision"
+	PATH_SEPARATOR     = "/"
 
 	// metadata service
 	METADATA_SERVICE_NAME = "org.apache.dubbo.metadata.MetadataService"