diff --git a/sopel/modules/url.py b/sopel/modules/url.py
index 6009063edc..8bd1de4374 100644
--- a/sopel/modules/url.py
+++ b/sopel/modules/url.py
@@ -99,7 +99,7 @@ def trim_url(url):
 
             # clean unmatched parentheses/braces/brackets
             for (opener, closer) in [('(', ')'), ('[', ']'), ('{', '}'), ('<', '>')]:
-                if url[-1] is closer and url.count(opener) < url.count(closer):
+                if (url[-1] == closer) and (url.count(opener) < url.count(closer)):
                     url = url[:-1]
 
             return url