diff --git a/paddle/go/pserver/optimizer.c b/paddle/go/pserver/optimizer.c
index 8d63089b4cde386a17da18659efcd12ecc05da84..b8da3ec9592053e3efe00e69d73a8ae259a30a2f 100644
--- a/paddle/go/pserver/optimizer.c
+++ b/paddle/go/pserver/optimizer.c
@@ -2,10 +2,10 @@
 
 #include "optimizer.h"
 
-typedef int (*update_func)(void*, void *, paddle_element_type, const void*, int);
+typedef int (*update_func)(void*, void*, paddle_element_type, const void*, int);
 typedef void (*release_func)(void*);
 
-typedef struct paddle_optimizer{
+typedef struct paddle_optimizer {
   update_func update;
   release_func release;
   void* optimizer;
@@ -16,23 +16,29 @@ void paddle_release_optimizer(paddle_optimizer* o) {
   free(o);
 }
 
-int paddle_update_parameter(paddle_optimizer* o, void *buffer, paddle_element_type element_type, const void* gradient, int num_bytes) {
+int paddle_update_parameter(paddle_optimizer* o,
+                            void* buffer,
+                            paddle_element_type element_type,
+                            const void* gradient,
+                            int num_bytes) {
   return o->update(o->optimizer, buffer, element_type, gradient, num_bytes);
 }
 
-typedef struct {
-  double learning_rate;
-} SGD_optimizer;
+typedef struct { double learning_rate; } SGD_optimizer;
 
-int update_SGD(void* optimizer, void *buffer, paddle_element_type element_type, const void* gradient, int num_bytes) {
+int update_SGD(void* optimizer,
+               void* buffer,
+               paddle_element_type element_type,
+               const void* gradient,
+               int num_bytes) {
   SGD_optimizer* o = (SGD_optimizer*)optimizer;
   // TODO
   return 0;
 }
 
-void release_SGD(void *optimizer) {
-    SGD_optimizer* o = (SGD_optimizer*)optimizer;
-    // nothing allocated on heap
+void release_SGD(void* optimizer) {
+  SGD_optimizer* o = (SGD_optimizer*)optimizer;
+  // nothing allocated on heap
 }
 
 paddle_optimizer* paddle_create_SGD_optimizer(double learning_rate) {