diff --git a/cocos/platform/CCFileStream.cpp b/cocos/platform/CCFileStream.cpp
index 74ac55751c..627617cbdd 100644
--- a/cocos/platform/CCFileStream.cpp
+++ b/cocos/platform/CCFileStream.cpp
@@ -11,7 +11,7 @@
 
 #if defined(_WIN32)
 #define O_READ_FLAGS O_BINARY | O_RDONLY, S_IREAD
-#define O_WRITE_FLAGS O_CREAT | O_RDWR | O_BINARY, S_IWRITE | S_IREAD
+#define O_WRITE_FLAGS O_CREAT | O_RDWR | O_BINARY | O_TRUNC, S_IWRITE | S_IREAD
 #define O_APPEND_FLAGS O_APPEND | O_CREAT | O_RDWR | O_BINARY, S_IWRITE | S_IREAD
 #define posix_open ::_open
 #define posix_close ::_close
@@ -20,7 +20,7 @@
 #define posix_write ::_write
 #else
 #define O_READ_FLAGS O_RDONLY, S_IRUSR
-#define O_WRITE_FLAGS O_CREAT | O_RDWR, S_IRWXU
+#define O_WRITE_FLAGS O_CREAT | O_RDWR | O_TRUNC, S_IRWXU
 #define O_APPEND_FLAGS O_APPEND | O_CREAT | O_RDWR, S_IRWXU
 #define posix_open ::open
 #define posix_close ::close