diff --git a/redbot/cogs/cleanup/cleanup.py b/redbot/cogs/cleanup/cleanup.py
index b202409e8..af8c3b584 100644
--- a/redbot/cogs/cleanup/cleanup.py
+++ b/redbot/cogs/cleanup/cleanup.py
@@ -71,11 +71,11 @@ class Cleanup:
         to_delete = []
         too_old = False
 
-        while not too_old and len(to_delete) - 1 < number:
+        while not too_old and len(to_delete) < number:
             message = None
             async for message in channel.history(limit=limit, before=before, after=after):
                 if (
-                    (not number or len(to_delete) - 1 < number)
+                    (not number or len(to_delete) < number)
                     and check(message)
                     and (ctx.message.created_at - message.created_at).days < 14
                     and (delete_pinned or not message.pinned)