diff --git a/cocos2dx/cocoa/CCDictionary.cpp b/cocos2dx/cocoa/CCDictionary.cpp
index 64a0c11fd6..9bd909e4f3 100644
--- a/cocos2dx/cocoa/CCDictionary.cpp
+++ b/cocos2dx/cocoa/CCDictionary.cpp
@@ -93,10 +93,11 @@ CCObject* CCDictionary::objectForKey(const std::string& key)
 {
     if (m_eDictType != kCCDictStr)
     {
-        CCAssert(m_eDictType == kCCDictStr, "this dictionary does not use string as key.");
         return NULL;
     }
 
+    CCAssert(m_eDictType == kCCDictStr, "this dictionary does not use string as key.");
+    
     CCObject* pRetObject = NULL;
     CCDictElement *pElement = NULL;
     HASH_FIND_STR(m_pElements, key.c_str(), pElement);
@@ -111,10 +112,11 @@ CCObject* CCDictionary::objectForKey(int key)
 {
     if (m_eDictType != kCCDictInt)
     {
-        CCAssert(m_eDictType == kCCDictInt, "this dictionary does not use integer as key.");
         return NULL;
     }
 
+    CCAssert(m_eDictType == kCCDictInt, "this dictionary does not use integer as key.");
+    
     CCObject* pRetObject = NULL;
     CCDictElement *pElement = NULL;
     HASH_FIND_INT(m_pElements, &key, pElement);