--- a/hgext/bzexport/__init__.py
+++ b/hgext/bzexport/__init__.py
@@ -240,17 +240,17 @@ def select_users(valid, keys):
     users = []
     for key in keys:
         users.extend(valid[key])
     return users
 
 
 # Copied from savecommitmessage in localrepo.py (but with variable filename and unicode)
 def savefile(repo, basename, text):
-    fp = repo.opener(basename, 'wb')
+    fp = repo.vfs(basename, 'wb')
     try:
         fp.write(text.encode('utf-8'))
     finally:
         fp.close()
     return repo.pathto(fp.name[len(repo.root) + 1:])
 
 # Sure sign of a poor developer: they implement their own half-assed, one-off
 # templating engine instead of reusing an existing one.