diff --git a/ext/bbcode/main.php b/ext/bbcode/main.php
index f5c9a5c0..33165a39 100644
--- a/ext/bbcode/main.php
+++ b/ext/bbcode/main.php
@@ -12,6 +12,7 @@ class BBCode extends Extension {
 		$text = preg_replace("/\[b\](.*?)\[\/b\]/s", "<b>\\1</b>", $text);
 		$text = preg_replace("/\[i\](.*?)\[\/i\]/s", "<i>\\1</i>", $text);
 		$text = preg_replace("/\[u\](.*?)\[\/u\]/s", "<u>\\1</u>", $text);
+		$text = preg_replace("/\[s\](.*?)\[\/s\]/s", "<s>\\1</s>", $text);
 		$text = preg_replace("/\[code\](.*?)\[\/code\]/s", "<pre>\\1</pre>", $text);
 		$text = preg_replace("/&gt;&gt;(\d+)/s", "<a href='".make_link("post/view/\\1")."'>&gt;&gt;\\1</a>", $text);
 		$text = preg_replace("/&gt;&gt;([^\d].+)/", "<blockquote><small>\\1</small></blockquote>", $text);
@@ -38,6 +39,7 @@ class BBCode extends Extension {
 		$text = preg_replace("/\[b\](.*?)\[\/b\]/s", "\\1", $text);
 		$text = preg_replace("/\[i\](.*?)\[\/i\]/s", "\\1", $text);
 		$text = preg_replace("/\[u\](.*?)\[\/u\]/s", "\\1", $text);
+		$text = preg_replace("/\[s\](.*?)\[\/s\]/s", "\\1", $text);
 		$text = preg_replace("/\[code\](.*?)\[\/code\]/s", "\\1", $text);
 		$text = preg_replace("/\[url=(.*?)\](.*?)\[\/url\]/s", "\\2", $text);
 		$text = preg_replace("/\[url\](.*?)\[\/url\]/s", "\\1", $text);