diff --git a/mod/assign/templates/grading_navigation_user_summary.mustache b/mod/assign/templates/grading_navigation_user_summary.mustache
index 2bb67fbb070..b509e574e1f 100644
--- a/mod/assign/templates/grading_navigation_user_summary.mustache
+++ b/mod/assign/templates/grading_navigation_user_summary.mustache
@@ -42,7 +42,7 @@
         <a href="{{globals.config.wwwroot}}/user/view.php?id={{id}}&course={{courseid}}">
     {{/blindmarking}}
     {{#profileimageurl}}
-        <img src="{{profileimageurl}}" class="img-rounded" height="40" role="presentation"/>
+        <img src="{{profileimageurl}}" class="img-rounded" height="40" alt=""/>
     {{/profileimageurl}}
     {{fullname}}
     {{#hasidentity}}