diff --git a/cocos/3d/CCBundle3D.cpp b/cocos/3d/CCBundle3D.cpp
index 78fe4462f7..cd6bc42f9a 100644
--- a/cocos/3d/CCBundle3D.cpp
+++ b/cocos/3d/CCBundle3D.cpp
@@ -463,11 +463,19 @@ bool Bundle3D::loadBinary(const std::string& path)
 
     // Read version
     unsigned char ver[2];
-    if (_binaryReader.read(ver, 1, 2) != 2 || ver[0] != 0 || ver[1] != 1)
+    if (_binaryReader.read(ver, 1, 2) == 2)
     {
-        clear();
-        CCLOGINFO(false, "Unsupported version: (%d, %d)", ver[0], ver[1]);
-        return false;
+        if (ver[0] != 0) {
+            clear();
+            CCLOGINFO(false, "Unsupported version: (%d, %d)", ver[0], ver[1]);
+            return false;
+        }
+        
+        if (ver[1] <= 0 || ver[1] > 2) {
+            clear();
+            CCLOGINFO(false, "Unsupported version: (%d, %d)", ver[0], ver[1]);
+            return false;
+        }
     }
 
     // Read ref table size
@@ -542,12 +550,12 @@ bool Bundle3D::loadMeshDataBinary(MeshData* meshdata)
     }
 
     // Read index data
-    ssize_t meshPartCount = 1;
+    unsigned int meshPartCount = 1;
     //_binaryReader.read(&meshPartCount, 4, 1);
 
-    for (ssize_t i = 0; i < meshPartCount; ++i)
+    for (unsigned int i = 0; i < meshPartCount; ++i)
     {
-        ssize_t nIndexCount;
+        unsigned int nIndexCount;
         if (_binaryReader.read(&nIndexCount, 4, 1) != 1)
         {
             CCLOGINFO("Failed to read meshdata: nIndexCount '%s'.", _path.c_str());
@@ -702,24 +710,24 @@ bool Bundle3D::loadAnimationDataBinary(Animation3DData* animationdata)
         return false;
     }
 
-    ssize_t animNum;
+    unsigned int animNum;
     if (!_binaryReader.read(&animNum))
     {
         CCLOGINFO("Failed to read AnimationData: animNum '%s'.", _path.c_str());
         return false;
     }
 
-    for (ssize_t i = 0; i < animNum; ++i)
+    for (unsigned int i = 0; i < animNum; ++i)
     {
         std::string boneName = _binaryReader.readString();
-        ssize_t keyframeNum;
+        unsigned int keyframeNum;
         if (!_binaryReader.read(&keyframeNum))
         {
             CCLOGINFO("Failed to read AnimationData: keyframeNum '%s'.", _path.c_str());
             return false;
         }
 
-        for (ssize_t j = 0; j < keyframeNum; ++j)
+        for (unsigned int j = 0; j < keyframeNum; ++j)
         {
             float keytime;
             if (!_binaryReader.read(&keytime))
@@ -808,7 +816,7 @@ unsigned int Bundle3D::parseGLProgramAttribute(const std::string& str)
 
 void Bundle3D::getModelRelativePath(const std::string& path)
 {
-    int index = path.find_last_of('/');
+    ssize_t index = path.find_last_of('/');
     std::string fullModelPath;
     fullModelPath = path.substr(0, index + 1);
 
diff --git a/cocos/3d/CCBundle3D.h b/cocos/3d/CCBundle3D.h
index 6717117f3c..f3a6319ed6 100644
--- a/cocos/3d/CCBundle3D.h
+++ b/cocos/3d/CCBundle3D.h
@@ -173,7 +173,7 @@ protected:
     // for binary reading
     Data* _binaryBuffer;
     BundleReader _binaryReader;
-    size_t _referenceCount;
+    unsigned int _referenceCount;
     Reference* _references;
 
     bool  _isBinary;
diff --git a/cocos/3d/CCBundleReader.cpp b/cocos/3d/CCBundleReader.cpp
index 7d7651e15e..2bdeda2c43 100644
--- a/cocos/3d/CCBundleReader.cpp
+++ b/cocos/3d/CCBundleReader.cpp
@@ -15,7 +15,7 @@ BundleReader::~BundleReader()
     
 };
 
-void BundleReader::init(char* lpbuffer, unsigned int length)
+void BundleReader::init(char* lpbuffer, ssize_t length)
 {
     m_position = 0;
     m_buffer  = lpbuffer;
diff --git a/cocos/3d/CCBundleReader.h b/cocos/3d/CCBundleReader.h
index dc42d76f95..b991412d8f 100644
--- a/cocos/3d/CCBundleReader.h
+++ b/cocos/3d/CCBundleReader.h
@@ -55,7 +55,7 @@ public:
      * @param lpbuffer The data buffer pointer
      * @param length The data buffer size
      */
-    void init(char* lpbuffer, unsigned int length);
+    void init(char* lpbuffer, ssize_t length);
 
     /**
      * Reads an array of elements.