diff --git a/mod/lesson/pagetypes/truefalse.php b/mod/lesson/pagetypes/truefalse.php
index 2c016de528a..87154abee7c 100644
--- a/mod/lesson/pagetypes/truefalse.php
+++ b/mod/lesson/pagetypes/truefalse.php
@@ -76,12 +76,11 @@ class lesson_page_type_truefalse extends lesson_page {
 
         $result = parent::check_answer();
 
-        $answerid = $data->answerid;
-        if ($answerid === false) {
+        if (empty($data->answerid)) {
             $result->noanswer = true;
             return $result;
         }
-        $result->answerid = $answerid;
+        $result->answerid = $data->answerid;
         $answer = $DB->get_record("lesson_answers", array("id" => $result->answerid), '*', MUST_EXIST);
         if ($this->lesson->jumpto_is_correct($this->properties->id, $answer->jumpto)) {
             $result->correctanswer = true;