diff --git a/mod/quiz/report/responses/responses_table.php b/mod/quiz/report/responses/responses_table.php
index ed6ada43198..a5a0c094d83 100644
--- a/mod/quiz/report/responses/responses_table.php
+++ b/mod/quiz/report/responses/responses_table.php
@@ -63,7 +63,7 @@ class quiz_responses_table extends quiz_attempts_report_table {
     }
 
     public function col_sumgrades($attempt) {
-        if ($attempt->state == quiz_attempt::FINISHED) {
+        if ($attempt->state != quiz_attempt::FINISHED) {
             return '-';
         }