1 files changed, 1 insertions, 1 deletions
diff --git a/pow_si.c b/pow_si.c
index 56d3ee69a..61474821f 100644
--- a/pow_si.c
+++ b/pow_si.c
@@ -90,7 +90,7 @@ mpfr_pow_si (mpfr_ptr y, mpfr_srcptr x, long int n, mp_rnd_t rnd_mode)
         /* compute the precision of intermediary variable */
         Nt=MAX(Nx,Ny);
         /* the optimal number of bits : see algorithms.ps */
-        Nt=Nt+3+_mpfr_ceil_log2(Nt);
+        Nt=Nt+3+__gmpfr_ceil_log2(Nt);
 
         /* initialise of intermediary	variable */
         mpfr_init(t);