diff --git a/extensions/GUI/CCEditBox/CCEditBoxImplAndroid.cpp b/extensions/GUI/CCEditBox/CCEditBoxImplAndroid.cpp
index 173c32b994..2a19344c7e 100644
--- a/extensions/GUI/CCEditBox/CCEditBoxImplAndroid.cpp
+++ b/extensions/GUI/CCEditBox/CCEditBoxImplAndroid.cpp
@@ -264,12 +264,12 @@ static void editBoxCallbackFunc(const char* pText, void* ctx)
         CommonScriptData data(pEditBox->getScriptEditBoxHandler(), "changed",pEditBox);
         ScriptEvent event(kCommonEvent,(void*)&data);
         ScriptEngineManager::getInstance()->getScriptEngine()->sendEvent(&event);
-        memset(data.eventName,0,64*sizeof(char));
-        strncpy(data.eventName,"ended",64);
+        memset(data.eventName, 0, sizeof(data.eventName));
+        strncpy(data.eventName, "ended", sizeof(data.eventName));
         event.data = (void*)&data;
         ScriptEngineManager::getInstance()->getScriptEngine()->sendEvent(&event);
-        memset(data.eventName,0,64*sizeof(char));
-        strncpy(data.eventName,"return",64);
+        memset(data.eventName, 0, sizeof(data.eventName));
+        strncpy(data.eventName, "return", sizeof(data.eventName));
         event.data = (void*)&data;
         ScriptEngineManager::getInstance()->getScriptEngine()->sendEvent(&event);
     }
diff --git a/extensions/GUI/CCEditBox/CCEditBoxImplIOS.mm b/extensions/GUI/CCEditBox/CCEditBoxImplIOS.mm
index 2befae216a..ecb9a46a02 100644
--- a/extensions/GUI/CCEditBox/CCEditBoxImplIOS.mm
+++ b/extensions/GUI/CCEditBox/CCEditBoxImplIOS.mm
@@ -196,8 +196,8 @@ static const int CC_EDIT_BOX_PADDING = 5;
         cocos2d::CommonScriptData data(pEditBox->getScriptEditBoxHandler(), "ended",pEditBox);
         cocos2d::ScriptEvent event(cocos2d::kCommonEvent,(void*)&data);
         cocos2d::ScriptEngineManager::getInstance()->getScriptEngine()->sendEvent(&event);
-        memset(data.eventName,0,64*sizeof(char));
-        strncpy(data.eventName,"return",64);
+        memset(data.eventName, 0, sizeof(data.eventName));
+        strncpy(data.eventName, "return", sizeof(data.eventName));
         event.data = (void*)&data;
         cocos2d::ScriptEngineManager::getInstance()->getScriptEngine()->sendEvent(&event);
     }
diff --git a/extensions/GUI/CCEditBox/CCEditBoxImplMac.mm b/extensions/GUI/CCEditBox/CCEditBoxImplMac.mm
index 3af3c7448f..aa7c2b5905 100644
--- a/extensions/GUI/CCEditBox/CCEditBoxImplMac.mm
+++ b/extensions/GUI/CCEditBox/CCEditBoxImplMac.mm
@@ -187,8 +187,8 @@
         cocos2d::CommonScriptData data(pEditBox->getScriptEditBoxHandler(), "ended",pEditBox);
         cocos2d::ScriptEvent event(cocos2d::kCommonEvent,(void*)&data);
         cocos2d::ScriptEngineManager::getInstance()->getScriptEngine()->sendEvent(&event);
-        memset(data.eventName,0,64*sizeof(char));
-        strncpy(data.eventName,"return",64);
+        memset(data.eventName, 0, sizeof(data.eventName));
+        strncpy(data.eventName, "return", sizeof(data.eventName));
         event.data = (void*)&data;
         cocos2d::ScriptEngineManager::getInstance()->getScriptEngine()->sendEvent(&event);
     }