1 files changed, 1 insertions, 1 deletions
diff --git a/acos.c b/acos.c
index 059a115db..7880d5ed7 100644
--- a/acos.c
+++ b/acos.c
@@ -28,7 +28,7 @@ mpfr_acos (mpfr_ptr acos, mpfr_srcptr x, mpfr_rnd_t rnd_mode)
 {
   mpfr_t xp, arcc, tmp;
   mp_exp_t supplement;
-  mp_prec_t prec;
+  mpfr_prec_t prec;
   int sign, compared, inexact;
   MPFR_SAVE_EXPO_DECL (expo);
   MPFR_ZIV_DECL (loop);