diff --git a/files/helpers/const.py b/files/helpers/const.py
index 49215a0b2a..472dbfc588 100644
--- a/files/helpers/const.py
+++ b/files/helpers/const.py
@@ -680,7 +680,7 @@ video_regex = re.compile('<p><a href="(https:\/\/.*?\.(mp4|webm|mov))" rel="nofo
 unlinked_regex = re.compile('(^|\s|<p>)(https:\/\/[^ <>]*)', flags=re.A)
 imgur_regex = re.compile('(https://i\.imgur\.com/([^_]*?))\.(jpg|png|jpeg|webp)(?!</code>)', flags=re.A)
 reddit_regex = re.compile('(^|\s|<p>)\/?((r|u)\/(\w|-){3,25})', flags=re.A)
-sub_regex = re.compile(r'(^|\h|<p>)\/?(h\/(\w|-){3,25})', flags=re.A)
+sub_regex = re.compile('(^|\s|<p>)\/?(s\/(\w|-){3,25})', flags=re.A)
 youtube_regex = re.compile('" target="_blank">(https://youtube\.com/watch\?v\=(.*?))</a>(?!</code>)', flags=re.A)
 strikethrough_regex = re.compile('~{1,2}([^~]+)~{1,2}', flags=re.A)