diff --git a/cocos/audio/src/AudioDecoderMp3.cpp b/cocos/audio/src/AudioDecoderMp3.cpp
index c0a3a02c1b..07b20a3390 100644
--- a/cocos/audio/src/AudioDecoderMp3.cpp
+++ b/cocos/audio/src/AudioDecoderMp3.cpp
@@ -128,7 +128,7 @@ namespace cocos2d {
 #if !CC_USE_MPG123
         do
         {
-            if (!_fileStream.open(fullPath))
+            if (!_fileStream.open(fullPath, FileStream::Mode::READ))
             {
                 ALOGE("Trouble with minimp3(1): %s\n", strerror(errno));
                 break;
diff --git a/cocos/audio/src/AudioDecoderOgg.cpp b/cocos/audio/src/AudioDecoderOgg.cpp
index a99d57a552..7581af0ceb 100644
--- a/cocos/audio/src/AudioDecoderOgg.cpp
+++ b/cocos/audio/src/AudioDecoderOgg.cpp
@@ -69,7 +69,7 @@ namespace cocos2d {
 
     bool AudioDecoderOgg::open(const std::string& fullPath)
     {
-        if (!_fileStream.open(fullPath))
+        if (!_fileStream.open(fullPath, FileStream::Mode::READ))
         {
             ALOGE("Trouble with ogg(1): %s\n", strerror(errno));
             return false;
diff --git a/cocos/audio/src/AudioDecoderWav.cpp b/cocos/audio/src/AudioDecoderWav.cpp
index abbeacbf4b..3501adad58 100644
--- a/cocos/audio/src/AudioDecoderWav.cpp
+++ b/cocos/audio/src/AudioDecoderWav.cpp
@@ -76,7 +76,7 @@ namespace cocos2d {
     }
     static bool wav_open(const std::string& fullPath, WAV_FILE* wavf)
     {
-        bool succeed = wavf->Stream.open(fullPath);
+        bool succeed = wavf->Stream.open(fullPath, FileStream::Mode::READ);
         if (!succeed)
             return false;
 
diff --git a/cocos/network/CCDownloader-curl.cpp b/cocos/network/CCDownloader-curl.cpp
index edd18fabfb..27276f7445 100644
--- a/cocos/network/CCDownloader-curl.cpp
+++ b/cocos/network/CCDownloader-curl.cpp
@@ -151,7 +151,7 @@ namespace cocos2d { namespace network {
                     }
                 }
                 // open file
-                _fs.open(_tempFileName, FileStream::kModeAppend);
+                _fs.open(_tempFileName, FileStream::Mode::APPEND);
                 if (!_fs)
                 {
                     _errCode = DownloadTask::ERROR_OPEN_FILE_FAILED;
@@ -163,7 +163,7 @@ namespace cocos2d { namespace network {
 
 				// init md5 state
 				_checksumFileName = filename + ".chksum";
-				_fsMd5.open(_checksumFileName.c_str(), FileStream::kModeWrite);
+				_fsMd5.open(_checksumFileName.c_str(), FileStream::Mode::WRITE);
 				if (_fsMd5.seek(0, SEEK_END) != sizeof(md5_state_s)) {
 					md5_init(&_md5State);
 				}
@@ -902,7 +902,7 @@ public:
 				if (checkState & kCheckSumStateSucceed) // No need download 
 				{
 					FileStream fsOrigin;
-					if (fsOrigin.open(coTask._fileName)) {
+					if (fsOrigin.open(coTask._fileName, FileStream::Mode::READ)) {
 						task.progressInfo.totalBytesExpected = fsOrigin.seek(0, SEEK_END);
 						task.progressInfo.bytesReceived = task.progressInfo.totalBytesExpected;
 						task.progressInfo.totalBytesReceived = task.progressInfo.totalBytesExpected;
diff --git a/cocos/platform/CCFileStream.cpp b/cocos/platform/CCFileStream.cpp
index c3a514522a..b4166cf14f 100644
--- a/cocos/platform/CCFileStream.cpp
+++ b/cocos/platform/CCFileStream.cpp
@@ -37,16 +37,16 @@ struct PXIoF {
     int(*close)(PXFileHandle& handle);
 };
 
-static int pfs_posix_open(const std::string& path, int mode, PXFileHandle& handle)
+static int pfs_posix_open(const std::string& path, FileStream::Mode mode, PXFileHandle& handle)
 {
     switch (mode) {
-    case FileStream::kModeReadOnly:
+    case FileStream::Mode::READ:
         handle._fd = posix_open(path.c_str(), O_READ_FLAGS);
         break;
-    case FileStream::kModeWrite:
+    case FileStream::Mode::WRITE:
         handle._fd = posix_open(path.c_str(), O_WRITE_FLAGS);
         break;
-    case FileStream::kModeAppend:
+    case FileStream::Mode::APPEND:
         handle._fd = posix_open(path.c_str(), O_APPEND_FLAGS);
         break;
     default:
@@ -112,7 +112,7 @@ FileStream::~FileStream()
     this->close();
 }
 
-bool FileStream::open(const std::string& path, int mode)
+bool FileStream::open(const std::string& path, FileStream::Mode mode)
 {
 #if CC_TARGET_PLATFORM != CC_PLATFORM_ANDROID
     return pfs_posix_open(path, mode, _handle) != -1;
diff --git a/cocos/platform/CCFileStream.h b/cocos/platform/CCFileStream.h
index 204c311f61..7f817eb213 100644
--- a/cocos/platform/CCFileStream.h
+++ b/cocos/platform/CCFileStream.h
@@ -42,13 +42,13 @@ public:
     FileStream();
     ~FileStream();
 
-    enum Mode {
-        kModeReadOnly,
-        kModeWrite,
-        kModeAppend,
+    enum class Mode {
+        READ,
+        WRITE,
+        APPEND,
     };
 
-    bool open(const std::string& path, int mode = kModeReadOnly);
+    bool open(const std::string& path, Mode mode);
     int close();
 
     int seek(long offset, int origin);