1 files changed, 1 insertions, 1 deletions
diff --git a/atan.c b/atan.c
index e37cf3f21..e83903dd8 100644
--- a/atan.c
+++ b/atan.c
@@ -265,7 +265,7 @@ mpfr_atan (mpfr_ptr atan, mpfr_srcptr x, mpfr_rnd_t rnd_mode)
     }
 
   realprec = MPFR_PREC (atan) + MPFR_INT_CEIL_LOG2 (MPFR_PREC (atan)) + 4;
-  prec = realprec + GMP_LIMB_BITS;
+  prec = realprec + GMP_NUMB_BITS;
 
   /* Initialisation */
   mpz_init (ukz);