/// 27.2, paragraph 10 about fpos/char_traits circularity
typedef fpos<mbstate_t> streampos;
-# ifdef _GLIBCPP_USE_WCHAR_T
+# ifdef _GLIBCXX_USE_WCHAR_T
/// 27.2, paragraph 10 about fpos/char_traits circularity
typedef fpos<mbstate_t> wstreampos;
# endif