diff --git a/pagure/lib/__init__.py b/pagure/lib/__init__.py
index 6ac068e..c543008 100644
--- a/pagure/lib/__init__.py
+++ b/pagure/lib/__init__.py
@@ -1301,7 +1301,7 @@ def avatar_url(username, size=64, default='retro'):
     try:
         return avatar_url_from_openid(openid, size, default)
     except Exception as err:
-        pagure.LOG.debug('openid {0}', openid)
+        pagure.LOG.debug('openid %s', openid)
         pagure.LOG.exception(err)
         return ''