diff --git a/internal/distributed/proxy/service.go b/internal/distributed/proxy/service.go
index 2d84582840..d25b45617a 100644
--- a/internal/distributed/proxy/service.go
+++ b/internal/distributed/proxy/service.go
@@ -388,6 +388,7 @@ func (s *Server) ShowPartitions(ctx context.Context, request *milvuspb.ShowParti
 	return s.proxy.ShowPartitions(ctx, request)
 }
 
+// CreateIndex notifies Proxy to create index
 func (s *Server) CreateIndex(ctx context.Context, request *milvuspb.CreateIndexRequest) (*commonpb.Status, error) {
 	return s.proxy.CreateIndex(ctx, request)
 }