diff --git a/include/fstream b/include/fstream
index ea9aee67..76452102 100644
--- a/include/fstream
+++ b/include/fstream
@@ -173,6 +173,11 @@ typedef basic_fstream<wchar_t> wfstream;
 
 #pragma GCC system_header
 
+#ifdef _WIN32
+#define fseeko fseek
+#define ftello ftell
+#endif
+
 _LIBCPP_BEGIN_NAMESPACE_STD
 
 template <class _CharT, class _Traits>