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diff --git a/ghc/rts/gmp/mpz/getlimbn.c b/ghc/rts/gmp/mpz/getlimbn.c
new file mode 100644
index 0000000..c7a234b
--- /dev/null
+++ b/ghc/rts/gmp/mpz/getlimbn.c
@@ -0,0 +1,38 @@
+/* mpz_getlimbn(integer,n) -- Return the N:th limb from INTEGER.
+
+Copyright (C) 1993, 1994, 1995 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 Library General Public License as published by
+the Free Software Foundation; either version 2 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 Library General Public
+License for more details.
+
+You should have received a copy of the GNU Library General Public License
+along with the GNU MP Library; see the file COPYING.LIB.  If not, write to
+the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
+MA 02111-1307, USA. */
+
+#include "gmp.h"
+#include "gmp-impl.h"
+
+mp_limb_t
+#if __STDC__
+mpz_getlimbn (mpz_srcptr integer, mp_size_t n)
+#else
+mpz_getlimbn (integer, n)
+     mpz_srcptr integer;
+     mp_size_t n;
+#endif
+{
+  if (integer->_mp_size <= n || n < 0)
+    return 0;
+  else
+    return integer->_mp_d[n];
+}