diff --git a/bip-0328/reference.py b/bip-0328/reference.py
index d7e493e2ea..473dd23422 100644
--- a/bip-0328/reference.py
+++ b/bip-0328/reference.py
@@ -4,7 +4,6 @@
 import os
 import sys
 
-from _base58 import xpub_to_pub_hex
 from _bip327 import cbytes, key_agg
 from _xpub import ExtendedKey