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diff --git a/gmp/mpf/set_dfl_prec.c b/gmp/mpf/set_dfl_prec.c
new file mode 100644
index 00000000..5266745b
--- /dev/null
+++ b/gmp/mpf/set_dfl_prec.c
@@ -0,0 +1,29 @@
+/* mpf_set_default_prec --
+
+Copyright 1993, 1994, 1995, 2001 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 "gmp.h"
+#include "gmp-impl.h"
+
+mp_size_t __gmp_default_fp_limb_precision = __GMPF_BITS_TO_PREC (53);
+
+void
+mpf_set_default_prec (unsigned long int prec_in_bits)
+{
+  __gmp_default_fp_limb_precision = __GMPF_BITS_TO_PREC (prec_in_bits);
+}