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diff --git a/gmp/mpz/out_str.c b/gmp/mpz/out_str.c
new file mode 100644
index 00000000..1b962252
--- /dev/null
+++ b/gmp/mpz/out_str.c
@@ -0,0 +1,105 @@
+/* mpz_out_str(stream, base, integer) -- Output to STREAM the multi prec.
+   integer INTEGER in base BASE.
+
+Copyright 1991, 1993, 1994, 1996, 2001, 2005 Free Software Foundation, Inc.
+
+This file is part of the GNU MP Library.
+
+The GNU MP Library is free software; you can redistribute it and/or modify
+it under the terms of the GNU Lesser General Public License as published by
+the Free Software Foundation; either version 3 of the License, or (at your
+option) any later version.
+
+The GNU MP Library is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
+License for more details.
+
+You should have received a copy of the GNU Lesser General Public License
+along with the GNU MP Library.  If not, see http://www.gnu.org/licenses/.  */
+
+#include <stdio.h>
+#include "gmp.h"
+#include "gmp-impl.h"
+
+size_t
+mpz_out_str (FILE *stream, int base, mpz_srcptr x)
+{
+  mp_ptr xp;
+  mp_size_t x_size = x->_mp_size;
+  unsigned char *str;
+  size_t str_size;
+  size_t i;
+  size_t written;
+  char *num_to_text;
+  TMP_DECL;
+
+  if (stream == 0)
+    stream = stdout;
+
+  if (base >= 0)
+    {
+      num_to_text = "0123456789abcdefghijklmnopqrstuvwxyz";
+      if (base == 0)
+	base = 10;
+      else if (base > 36)
+	{
+	  num_to_text = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
+	  if (base > 62)
+	    return 0;
+	}
+    }
+  else
+    {
+      base = -base;
+      num_to_text = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ";
+    }
+
+  if (x_size == 0)
+    {
+      fputc ('0', stream);
+      return ferror (stream) ? 0 : 1;
+    }
+
+  written = 0;
+
+  if (x_size < 0)
+    {
+      fputc ('-', stream);
+      x_size = -x_size;
+      written = 1;
+    }
+
+  TMP_MARK;
+  str_size = ((size_t) (x_size * BITS_PER_MP_LIMB
+			* __mp_bases[base].chars_per_bit_exactly)) + 3;
+  str = (unsigned char *) TMP_ALLOC (str_size);
+
+  /* Move the number to convert into temporary space, since mpn_get_str
+     clobbers its argument + needs one extra high limb....  */
+  xp = (mp_ptr) TMP_ALLOC ((x_size + 1) * BYTES_PER_MP_LIMB);
+  MPN_COPY (xp, x->_mp_d, x_size);
+
+  str_size = mpn_get_str (str, base, xp, x_size);
+
+  /* mpn_get_str might make some leading zeros.  Skip them.  */
+  while (*str == 0)
+    {
+      str_size--;
+      str++;
+    }
+
+  /* Translate to printable chars.  */
+  for (i = 0; i < str_size; i++)
+    str[i] = num_to_text[str[i]];
+  str[str_size] = 0;
+
+  {
+    size_t fwret;
+    fwret = fwrite ((char *) str, 1, str_size, stream);
+    written += fwret;
+  }
+
+  TMP_FREE;
+  return ferror (stream) ? 0 : written;
+}