diff --git a/src/Models/Model_Post_QueryBuilder.php b/src/Models/Model_Post_QueryBuilder.php
index 0828fce9..fddc2f33 100644
--- a/src/Models/Model_Post_QueryBuilder.php
+++ b/src/Models/Model_Post_QueryBuilder.php
@@ -216,6 +216,25 @@ class Model_Post_QueryBuilder implements AbstractQueryBuilder
 		return self::filterTokenFav($dbQuery, $val);
 	}
 
+	protected static function filterTokenComment($dbQuery, $val)
+	{
+		$dbQuery
+			->exists()
+			->open()
+			->select('1')
+			->from('comment')
+			->innerJoin('user')
+			->on('commenter_id = user.id')
+			->where('post_id = post.id')
+			->and('user.name = ?')->put($val)
+			->close();
+	}
+
+	protected static function filterTokenCommenter($dbQuery, $val)
+	{
+		return self::filterTokenComment($dbQuery, $val);
+	}
+
 	protected static function filterTokenSubmit($dbQuery, $val)
 	{
 		$dbQuery
diff --git a/src/Views/index-help.phtml b/src/Views/index-help.phtml
index 0c1a5b51..e8da7adc 100644
--- a/src/Views/index-help.phtml
+++ b/src/Views/index-help.phtml
@@ -22,6 +22,7 @@
 <li>uploaded by David: <a href="<?php echo \Chibi\UrlHelper::route('post', 'list', ['query' => 'submit:David']) ?>"><code>submit:David</code></a> (note no spaces)</li>
 <li>favorited by David: <a href="<?php echo \Chibi\UrlHelper::route('post', 'list', ['query' => 'fav:David']) ?>"><code>fav:David</code></a></li>
 <li>favorited by at least four users: <a href="<?php echo \Chibi\UrlHelper::route('post', 'list', ['query' => 'favmin:4']) ?>"><code>favmin:4</code></a></li>
+<li>commented by David: <a href="<?php echo \Chibi\UrlHelper::route('post', 'list', ['query' => 'comment:David']) ?>"><code>comment:David</code></a></li>
 <li>commented by at least three users: <a href="<?php echo \Chibi\UrlHelper::route('post', 'list', ['query' => 'commentmin:3']) ?>"><code>commentmin:3</code></a></li>
 <li>having minimum score of 4: <a href="<?php echo \Chibi\UrlHelper::route('post', 'list', ['query' => 'scoremin:4']) ?>"><code>scoremin:4</code></a></li>
 <li>tagged with at least seven tags: <a href="<?php echo \Chibi\UrlHelper::route('post', 'list', ['query' => 'tagmin:7']) ?>"><code>tagmin:7</code></a></li>