diff --git a/grade/report/grader/module.js b/grade/report/grader/module.js
index 4a36598..78d3b0e 100644
--- a/grade/report/grader/module.js
+++ b/grade/report/grader/module.js
@@ -754,8 +754,10 @@ M.gradereport_grader.classes.existingfield = function(ajax, userid, itemid) {
         this.oldgrade = '';
     }
 
-    // On blur save any changes in the grade field
-    this.grade.on('blur', this.submit, this);
+    if(this.grade) {
+        // On blur save any changes in the grade field
+        this.grade.on('blur', this.submit, this);
+    }
 
     // Check if feedback is enabled
     if (this.editfeedback) {