diff --git a/lib/private/AllConfig.php b/lib/private/AllConfig.php
index cc3a3ad90d45e..263b528313388 100644
--- a/lib/private/AllConfig.php
+++ b/lib/private/AllConfig.php
@@ -462,7 +462,7 @@ public function getUserValueForUsers($appName, $key, $userIds) {
 	 * @param string $appName the app to get the user for
 	 * @param string $key the key to get the user for
 	 * @param string $value the value to get the user for
-	 * @return array of user IDs
+	 * @return list<string> of user IDs
 	 */
 	public function getUsersForUserValue($appName, $key, $value) {
 		// TODO - FIXME
@@ -496,7 +496,7 @@ public function getUsersForUserValue($appName, $key, $value) {
 	 * @param string $appName the app to get the user for
 	 * @param string $key the key to get the user for
 	 * @param string $value the value to get the user for
-	 * @return array of user IDs
+	 * @return list<string> of user IDs
 	 */
 	public function getUsersForUserValueCaseInsensitive($appName, $key, $value) {
 		// TODO - FIXME
diff --git a/lib/public/IConfig.php b/lib/public/IConfig.php
index b322267736e7b..3bc64c5e13337 100644
--- a/lib/public/IConfig.php
+++ b/lib/public/IConfig.php
@@ -245,7 +245,8 @@ public function deleteAppFromAllUsers($appName);
 	 * @param string $appName the app to get the user for
 	 * @param string $key the key to get the user for
 	 * @param string $value the value to get the user for
-	 * @return array of user IDs
+	 * @return list<string> of user IDs
+	 * @since 31.0.0 return type of `list<string>`
 	 * @since 8.0.0
 	 */
 	public function getUsersForUserValue($appName, $key, $value);