diff --git a/dubbo-metadata/dubbo-metadata-api/src/main/java/org/apache/dubbo/metadata/ServiceNameMapping.java b/dubbo-metadata/dubbo-metadata-api/src/main/java/org/apache/dubbo/metadata/ServiceNameMapping.java
index 91fce3cef42..21ae0c511a3 100644
--- a/dubbo-metadata/dubbo-metadata-api/src/main/java/org/apache/dubbo/metadata/ServiceNameMapping.java
+++ b/dubbo-metadata/dubbo-metadata-api/src/main/java/org/apache/dubbo/metadata/ServiceNameMapping.java
@@ -61,7 +61,7 @@ static ServiceNameMapping getDefaultExtension(ScopeModel scopeModel) {
     }
 
     static String buildMappingKey(URL url) {
-        return buildGroup(url.getServiceInterface());
+        return buildGroup(url.getColonSeparatedKey());
     }
 
     static String buildGroup(String serviceInterface) {