diff --git a/cocos/base/ZipUtils.cpp b/cocos/base/ZipUtils.cpp
index 101cc8090f90..0ca915e14b22 100644
--- a/cocos/base/ZipUtils.cpp
+++ b/cocos/base/ZipUtils.cpp
@@ -267,7 +267,7 @@ int ZipUtils::inflateGZipFile(const char *path, unsigned char **out)
     unsigned int totalBufferSize = bufferSize;
     
     *out = (unsigned char*)malloc( bufferSize );
-    if( ! out )
+    if(*out == NULL)
     {
         CCLOG("cocos2d: ZipUtils: out of memory");
         return -1;