diff --git a/configure b/configure
index 9130631..4c7b4b1 100755
--- a/configure
+++ b/configure
@@ -1,5 +1,5 @@
 #! /bin/sh
-# From configure.in Revision: 65206 .
+# From configure.in Revision: 65857 .
 # Guess values for system-dependent variables and create Makefiles.
 # Generated by GNU Autoconf 2.61 for python 3.0.
 #
@@ -24315,6 +24315,71 @@
 fi
 
 
+{ echo "$as_me:$LINENO: checking for broken mbstowcs" >&5
+echo $ECHO_N "checking for broken mbstowcs... $ECHO_C" >&6; }
+if test "$cross_compiling" = yes; then
+  ac_cv_broken_mbstowcs=no
+else
+  cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+
+#include<stdlib.h>
+int main() {
+    size_t len = -1;
+    const char *str = "text";
+    len = mbstowcs(NULL, str, 0);
+    return (len != 4);
+}
+
+_ACEOF
+rm -f conftest$ac_exeext
+if { (ac_try="$ac_link"
+case "(($ac_try" in
+  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+  *) ac_try_echo=$ac_try;;
+esac
+eval "echo \"\$as_me:$LINENO: $ac_try_echo\"") >&5
+  (eval "$ac_link") 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } && { ac_try='./conftest$ac_exeext'
+  { (case "(($ac_try" in
+  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+  *) ac_try_echo=$ac_try;;
+esac
+eval "echo \"\$as_me:$LINENO: $ac_try_echo\"") >&5
+  (eval "$ac_try") 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  ac_cv_broken_mbstowcs=no
+else
+  echo "$as_me: program exited with status $ac_status" >&5
+echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+( exit $ac_status )
+ac_cv_broken_mbstowcs=yes
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext conftest.$ac_objext conftest.$ac_ext
+fi
+
+
+{ echo "$as_me:$LINENO: result: $ac_cv_broken_mbstowcs" >&5
+echo "${ECHO_T}$ac_cv_broken_mbstowcs" >&6; }
+if test "$ac_cv_broken_mbstowcs" = yes
+then
+
+cat >>confdefs.h <<\_ACEOF
+#define HAVE_BROKEN_MBSTOWCS 1
+_ACEOF
+
+fi
+
 
 
 for h in `(cd $srcdir;echo Python/thread_*.h)`