diff --git a/redbot/cogs/cleanup/cleanup.py b/redbot/cogs/cleanup/cleanup.py
index c8311647c..1c1e426d6 100644
--- a/redbot/cogs/cleanup/cleanup.py
+++ b/redbot/cogs/cleanup/cleanup.py
@@ -378,7 +378,7 @@ class Cleanup(commands.Cog):
         to_delete.append(ctx.message)
 
         reason = "{}({}) deleted {} messages in channel {}.".format(
-            author.name, author.id, number, channel.name
+            author.name, author.id, len(to_delete), channel.name
         )
         log.info(reason)