diff --git a/files/helpers/sanitize.py b/files/helpers/sanitize.py
index 5c24dcb898..c2ec46a6e8 100644
--- a/files/helpers/sanitize.py
+++ b/files/helpers/sanitize.py
@@ -49,7 +49,7 @@ TLDS = ( # Original gTLDs and ccTLDs
 
 allowed_tags = ('b','blockquote','br','code','del','em','h1','h2','h3','h4','h5','h6','hr','i',
 	'li','ol','p','pre','strong','sub','sup','table','tbody','th','thead','td','tr','ul',
-	'marquee','a','span','ruby','rp','rt','spoiler','img','lite-youtube','video','audio','g')
+	'marquee','a','span','ruby','rp','rt','spoiler','img','lite-youtube','video','audio','g','u')
 
 allowed_styles = ['color', 'background-color', 'font-weight', 'text-align']
 
diff --git a/files/templates/formatting.html b/files/templates/formatting.html
index 5948e9d6db..430899b21e 100644
--- a/files/templates/formatting.html
+++ b/files/templates/formatting.html
@@ -547,6 +547,15 @@ line breaks
 				<img loading="lazy" alt="example image" src="https://i.imgur.com/SwVuagI_d.webp" width="200">
 			</td>
 		</tr>
+		<tr>
+			<td>Underlined Text</td>
+			<td>
+				&lt;u&gt;fart&lt;/u&gt;
+			</td>
+			<td>
+				<u>fart</u>
+			</td>
+		</tr>
 	</tbody>
 </table></div>