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diff --git a/gnu/mbrtowc.c b/gnu/mbrtowc.c
index 7768ce93..19f51591 100644
--- a/gnu/mbrtowc.c
+++ b/gnu/mbrtowc.c
@@ -1,7 +1,7 @@
 /* -*- buffer-read-only: t -*- vi: set ro: */
 /* DO NOT EDIT! GENERATED AUTOMATICALLY! */
 /* Convert multibyte character to wide character.
-   Copyright (C) 1999-2002, 2005-2010 Free Software Foundation, Inc.
+   Copyright (C) 1999-2002, 2005-2011 Free Software Foundation, Inc.
    Written by Bruno Haible <bruno@clisp.org>, 2008.
 
    This program is free software: you can redistribute it and/or modify
@@ -42,9 +42,6 @@ mbrtowc (wchar_t *pwc, const char *s, size_t n, mbstate_t *ps)
 {
   char *pstate = (char *)ps;
 
-  if (pstate == NULL)
-    pstate = internal_state;
-
   if (s == NULL)
     {
       pwc = NULL;
@@ -56,6 +53,10 @@ mbrtowc (wchar_t *pwc, const char *s, size_t n, mbstate_t *ps)
     return (size_t)(-2);
 
   /* Here n > 0.  */
+
+  if (pstate == NULL)
+    pstate = internal_state;
+
   {
     size_t nstate = pstate[0];
     char buf[4];
@@ -93,7 +94,7 @@ mbrtowc (wchar_t *pwc, const char *s, size_t n, mbstate_t *ps)
 
     /* Here m > 0.  */
 
-# if __GLIBC__
+# if __GLIBC__ || defined __UCLIBC__
     /* Work around bug <http://sourceware.org/bugzilla/show_bug.cgi?id=9674> */
     mbtowc (NULL, NULL, 0);
 # endif
@@ -323,7 +324,7 @@ mbrtowc (wchar_t *pwc, const char *s, size_t n, mbstate_t *ps)
 size_t
 rpl_mbrtowc (wchar_t *pwc, const char *s, size_t n, mbstate_t *ps)
 {
-# if MBRTOWC_NULL_ARG_BUG || MBRTOWC_RETVAL_BUG
+# if MBRTOWC_NULL_ARG2_BUG || MBRTOWC_RETVAL_BUG
   if (s == NULL)
     {
       pwc = NULL;
@@ -381,7 +382,16 @@ rpl_mbrtowc (wchar_t *pwc, const char *s, size_t n, mbstate_t *ps)
     return ret;
   }
 # else
-  return mbrtowc (pwc, s, n, ps);
+  {
+#   if MBRTOWC_NULL_ARG1_BUG
+    wchar_t dummy;
+
+    if (pwc == NULL)
+      pwc = &dummy;
+#   endif
+
+    return mbrtowc (pwc, s, n, ps);
+  }
 # endif
 }