diff --git a/tiny_gltf.h b/tiny_gltf.h
index e84725a..f9ef35d 100644
--- a/tiny_gltf.h
+++ b/tiny_gltf.h
@@ -7208,7 +7208,9 @@ static void WriteBinaryGltfFile(const std::string &output,
 #if defined(_MSC_VER)
   std::ofstream gltfFile(UTF8ToWchar(output).c_str(), std::ios::binary);
 #elif defined(__GLIBCXX__)
-  std::ofstream gltfFile(output.c_str(), std::ios::binary);
+  int file_descriptor = _wopen(UTF8ToWchar(output).c_str(), _O_WRONLY | _O_BINARY);
+  __gnu_cxx::stdio_filebuf<char> wfile_buf(file_descriptor, std::ios_base::in);
+  std::ostream gltfFile(&wfile_buf);
 #else
   std::ofstream gltfFile(output.c_str(), std::ios::binary);
 #endif