diff --git a/config_center/apollo/factory.go b/config_center/apollo/factory.go
index 14f9bf369113bb3d5ce28f70c9612c94f5866618..e3587357563233ba0c1b447e476515e22192d198 100644
--- a/config_center/apollo/factory.go
+++ b/config_center/apollo/factory.go
@@ -39,7 +39,7 @@ func createDynamicConfigurationFactory() DynamicConfigurationFactory {
 type apolloConfigurationFactory struct{}
 
 var (
-	once sync.Once
+	once                 sync.Once
 	dynamicConfiguration *apolloConfiguration
 )