diff --git a/paddle/optimizer/parameter_optimizer.cc b/paddle/optimizer/parameter_optimizer.cc
index 7f61196c1fcfc525f599a2ac0f005be030d7068e..a7362f07807b946412ce922ecb7647a7097db569 100644
--- a/paddle/optimizer/parameter_optimizer.cc
+++ b/paddle/optimizer/parameter_optimizer.cc
@@ -27,9 +27,9 @@ ParameterOptimizer *ParameterOptimizer::Create(const std::string &config_proto,
     return new ConstLr(0.1);
   };
   LrPolicy *lr = select_lr_policy(config);
-  auto select_optimizer =
-      [=](Tensor *parameter,
-          const OptimizerConfig &config) -> ParameterOptimizer * {
+  auto select_optimizer = [=](
+     Tensor *parameter,
+     const OptimizerConfig &config) -> ParameterOptimizer * {
     if (config.optimizer() == OptimizerConfig::SGD) {
       return new SGDOptimizer(parameter,
                               lr,