diff --git a/mod/quiz/report/statistics/statistics_table.php b/mod/quiz/report/statistics/statistics_table.php
index 90adc895ad4..077763c0b87 100644
--- a/mod/quiz/report/statistics/statistics_table.php
+++ b/mod/quiz/report/statistics/statistics_table.php
@@ -469,7 +469,7 @@ class quiz_statistics_table extends flexible_table {
         } else if (!is_numeric($questionstat->discriminativeefficiency)) {
             return '';
         } else {
-            return $this->format_percentage($questionstat->discriminativeefficiency);
+            return $this->format_percentage($questionstat->discriminativeefficiency, false);
         }
     }