diff --git a/paddle/optimizer/parameter_optimizer.cc b/paddle/optimizer/parameter_optimizer.cc
index 38fa2bfde9315311c909e959978e68cf44790bb0..f6218037925649e741d17f49af972ce2d50f8d3d 100644
--- a/paddle/optimizer/parameter_optimizer.cc
+++ b/paddle/optimizer/parameter_optimizer.cc
@@ -28,9 +28,9 @@ ParameterOptimizer *ParameterOptimizer::Create(const std::string &config_proto,
   };
 
   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,