diff --git a/src/sage/schemes/elliptic_curves/ell_point.py b/src/sage/schemes/elliptic_curves/ell_point.py
index f02bb90f282..34615bb46b8 100755
--- a/src/sage/schemes/elliptic_curves/ell_point.py
+++ b/src/sage/schemes/elliptic_curves/ell_point.py
@@ -142,7 +142,7 @@
 
 try:
     from sage.libs.pari.all import pari, PariError
-    from cypari2.pari_instance import prec_words_to_bits
+    from cypari2.pari_instance import prec_pari_to_bits
 except ImportError:
     PariError = ()
 
@@ -3705,7 +3705,7 @@ def elliptic_logarithm(self, embedding=None, precision=100,
         E_pari = E_work.pari_curve()
         log_pari = E_pari.ellpointtoz(pt_pari, precision=working_prec)
 
-        while prec_words_to_bits(log_pari.precision()) < precision:
+        while prec_pari_to_bits(log_pari.precision()) < precision:
             # result is not precise enough, re-compute with double
             # precision. if the base field is not QQ, this
             # requires modifying the precision of the embedding,