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diff --git a/rts/gmp/mpz/invert.c b/rts/gmp/mpz/invert.c
deleted file mode 100644
index 749a096..0000000
--- a/rts/gmp/mpz/invert.c
+++ /dev/null
@@ -1,77 +0,0 @@
-/* mpz_invert (inv, x, n).  Find multiplicative inverse of X in Z(N).
-   If X has an inverse, return non-zero and store inverse in INVERSE,
-   otherwise, return 0 and put garbage in INVERSE.
-
-Copyright (C) 1996, 1997, 1998, 1999, 2000 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 2.1 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; 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"
-
-int
-#if __STDC__
-mpz_invert (mpz_ptr inverse, mpz_srcptr x, mpz_srcptr n)
-#else
-mpz_invert (inverse, x, n)
-     mpz_ptr inverse;
-     mpz_srcptr x, n;
-#endif
-{
-  mpz_t gcd, tmp;
-  mp_size_t xsize, nsize, size;
-  TMP_DECL (marker);
-
-  xsize = SIZ (x);
-  nsize = SIZ (n);
-  xsize = ABS (xsize);
-  nsize = ABS (nsize);
-  size = MAX (xsize, nsize) + 1;
-
-  /* No inverse exists if the leftside operand is 0.  Likewise, no
-     inverse exists if the mod operand is 1.  */
-  if (xsize == 0 || (nsize == 1 && (PTR (n))[0] == 1))
-    return 0;
-
-  TMP_MARK (marker);
-
-  MPZ_TMP_INIT (gcd, size);
-  MPZ_TMP_INIT (tmp, size);
-  mpz_gcdext (gcd, tmp, (mpz_ptr) 0, x, n);
-
-  /* If no inverse existed, return with an indication of that.  */
-  if (gcd->_mp_size != 1 || (gcd->_mp_d)[0] != 1)
-    {
-      TMP_FREE (marker);
-      return 0;
-    }
-
-  /* Make sure we return a positive inverse.  */
-  if (SIZ (tmp) < 0)
-    {
-      if (SIZ (n) < 0)
-	mpz_sub (inverse, tmp, n);
-      else
-	mpz_add (inverse, tmp, n);
-    }
-  else
-    mpz_set (inverse, tmp);
-
-  TMP_FREE (marker);
-  return 1;
-}