diff --git a/classes/output/mobile.php b/classes/output/mobile.php
index e354424..1010342 100755
--- a/classes/output/mobile.php
+++ b/classes/output/mobile.php
@@ -36,7 +36,7 @@ class mobile {
     /**
      * Returns the gapfill question type for the quiz in the mobile app.
      * @param array $args
-     * @return void
+     * @return array
      */
     public static function mobile_get_gapfill($args) {
         global $CFG;