diff --git a/mod/quiz/lang/en/quiz.php b/mod/quiz/lang/en/quiz.php
index f81034e9dc9..c8306dbca6c 100644
--- a/mod/quiz/lang/en/quiz.php
+++ b/mod/quiz/lang/en/quiz.php
@@ -127,7 +127,7 @@ $string['cannotsavenumberofquestion'] = 'Could not save number of questions per
 $string['cannotsavequestion'] = 'Cannot save question list';
 $string['cannotsetgrade'] = 'Could not set a new maximum grade for the quiz';
 $string['cannotsetsumgrades'] = 'Failed to set sumgrades';
-$string['cannotstartgradesmismatch'] = 'Cannot start an attempt at this quiz. The quiz is supposed to be graded, but there are no questions in the quiz that are worth any marks.';
+$string['cannotstartgradesmismatch'] = 'Cannot start an attempt at this quiz. The quiz is set to be graded out of {$a->grade}, but none of the questions in the quiz have a grade. This can be fixed on the \'Edit quiz\' page.';
 $string['cannotstartmissingquestion'] = 'Cannot start an attempt at this quiz. The quiz definition includes a question that does not exist.';
 $string['cannotstartnoquestions'] = 'Cannot start an attempt at this quiz. The quiz has not been set up yet. No questions have been added.';
 $string['cannotwrite'] = 'Cannot write to export file ({$a})';
diff --git a/mod/quiz/locallib.php b/mod/quiz/locallib.php
index f4bba125c83..6ad5cd93a88 100644
--- a/mod/quiz/locallib.php
+++ b/mod/quiz/locallib.php
@@ -71,7 +71,8 @@ function quiz_create_attempt($quiz, $attemptnumber, $lastattempt, $timenow, $isp
 
     if ($quiz->sumgrades < 0.000005 && $quiz->grade > 0.000005) {
         throw new moodle_exception('cannotstartgradesmismatch', 'quiz',
-                new moodle_url('/mod/quiz/view.php', array('q' => $quiz->id)));
+                new moodle_url('/mod/quiz/view.php', array('q' => $quiz->id)),
+                    array('grade' => quiz_format_grade($quiz, $quiz->grade)));
     }
 
     if ($attemptnumber == 1 || !$quiz->attemptonlast) {