diff --git a/config/reference_config.go b/config/reference_config.go
index bb307d3a394bd33c9f94e0d9cc83d0a6b0736118..7b1c07fa3cefe4185bd6580f2ea5ddfd89e6a734 100644
--- a/config/reference_config.go
+++ b/config/reference_config.go
@@ -254,6 +254,6 @@ func (c *ReferenceConfig) GenericLoad(id string) {
 }
 
 // Get invoker
-func (c *ReferenceConfig) GetInvoker() protocol.Invoker{
+func (c *ReferenceConfig) GetInvoker() protocol.Invoker {
 	return c.invoker
 }