Index: dll/win32/msvcrt/msvcrt.spec
===================================================================
--- dll/win32/msvcrt/msvcrt.spec	(revision 73175)
+++ dll/win32/msvcrt/msvcrt.spec	(working copy)
@@ -761,7 +761,7 @@
 @ cdecl _wsystem(wstr)
 @ cdecl _wtempnam(wstr wstr)
 @ cdecl _wtmpnam(ptr)
-# @ cdecl _wtof(wstr)
+@ cdecl _wtof(wstr)
 @ cdecl _wtoi(wstr)
 @ cdecl _wtoi64(wstr)
 @ cdecl _wtol(wstr)
Index: sdk/lib/crt/crt.cmake
===================================================================
--- sdk/lib/crt/crt.cmake	(revision 73175)
+++ sdk/lib/crt/crt.cmake	(working copy)
@@ -305,6 +305,7 @@
     string/wcstombs_s.c
     string/wcstoul.c
     string/wctype.c
+    string/wtof.c
     string/wtoi.c
     string/wtoi64.c
     string/wtol.c
Index: sdk/lib/crt/string/wtof.c
===================================================================
--- sdk/lib/crt/string/wtof.c	(nonexistent)
+++ sdk/lib/crt/string/wtof.c	(working copy)
@@ -0,0 +1,7 @@
+#include <precomp.h>
+
+double
+_wtof(const wchar_t *str)
+{
+  return wcstod(str, 0);
+}