diff --git a/samples/Cpp/AssetsManagerTest/Classes/AppDelegate.cpp b/samples/Cpp/AssetsManagerTest/Classes/AppDelegate.cpp
index 31808c17b0..3e9381a865 100644
--- a/samples/Cpp/AssetsManagerTest/Classes/AppDelegate.cpp
+++ b/samples/Cpp/AssetsManagerTest/Classes/AppDelegate.cpp
@@ -18,6 +18,7 @@
 
 USING_NS_CC;
 USING_NS_CC_EXT;
+using namespace std;
 using namespace CocosDenshion;
 
 AppDelegate::AppDelegate()