diff --git a/winsup/mingw/ChangeLog b/winsup/mingw/ChangeLog
index 383377ee7..72c765301 100644
--- a/winsup/mingw/ChangeLog
+++ b/winsup/mingw/ChangeLog
@@ -1,3 +1,7 @@
+2009-06-16 Chris Sutcliffe <ir0nh34d@users.sourceforge.net>
+
+	* include/stdlib.h (_wtof): Define.
+
 2009-04-11 Danny Smith <dannsymith@users.sourceforge.net>
 
 	* include/stdint.h (int_fast8_t): Specify as signed char.
diff --git a/winsup/mingw/include/stdlib.h b/winsup/mingw/include/stdlib.h
index b58643059..ae36ebe0c 100644
--- a/winsup/mingw/include/stdlib.h
+++ b/winsup/mingw/include/stdlib.h
@@ -304,6 +304,7 @@ _CRTIMP double __cdecl __MINGW_NOTHROW	atof	(const char*);
 _CRTIMP int __cdecl __MINGW_NOTHROW	atoi	(const char*);
 _CRTIMP long __cdecl __MINGW_NOTHROW 	atol	(const char*);
 #if !defined (__STRICT_ANSI__)
+_CRTIMP double __cdecl __MINGW_NOTHROW	_wtof (const wchar_t *);
 _CRTIMP int __cdecl __MINGW_NOTHROW	_wtoi (const wchar_t *);
 _CRTIMP long __cdecl __MINGW_NOTHROW _wtol (const wchar_t *);
 #endif