diff --git a/src/Content/Text/Plaintext.php b/src/Content/Text/Plaintext.php
index e177ac387c..e635d727e8 100644
--- a/src/Content/Text/Plaintext.php
+++ b/src/Content/Text/Plaintext.php
@@ -36,7 +36,7 @@ class Plaintext
 	 *
 	 * @todo For Twitter URLs aren't shortened, but they have to be calculated as if.
 	 */
-	public static function shorten(string $msg, int $limit, int $uid = 0)
+	public static function shorten(string $msg, int $limit, int $uid = 0):string
 	{
 		$ellipsis = html_entity_decode("…", ENT_QUOTES, 'UTF-8');