diff --git a/paddle/parameter/ParameterUpdaterHook.cpp b/paddle/parameter/ParameterUpdaterHook.cpp
index a581cc047dfe11105774e4b81d781100606d718f..a4c0cb30994efb09274090a2498af8a10a292cda 100644
--- a/paddle/parameter/ParameterUpdaterHook.cpp
+++ b/paddle/parameter/ParameterUpdaterHook.cpp
@@ -130,7 +130,8 @@ private:
 
 static WeakKVCache<std::pair<std::string, int>,
                    IParameterUpdaterHook,
-                   StringIntPairHasher> g_hookCache_;
+                   StringIntPairHasher> 
+    g_hookCache_;
 
 /**
  * ParameterUpdaterHook actually factory method.