Index: lams_gradebook/src/java/org/lamsfoundation/lams/gradebook/web/action/GradebookAction.java
===================================================================
diff -u -rdf7043ae91ddb5337979f1fb0b2b72aa0199b3e4 -r59f1a5c76599f3ba7ba88462fff9d03a878d7c22
--- lams_gradebook/src/java/org/lamsfoundation/lams/gradebook/web/action/GradebookAction.java	(.../GradebookAction.java)	(revision df7043ae91ddb5337979f1fb0b2b72aa0199b3e4)
+++ lams_gradebook/src/java/org/lamsfoundation/lams/gradebook/web/action/GradebookAction.java	(.../GradebookAction.java)	(revision 59f1a5c76599f3ba7ba88462fff9d03a878d7c22)
@@ -188,9 +188,10 @@
 	resultJSON.put(GradebookConstants.ELEMENT_ROWS, rowsJSON);
 
 	boolean isWeighted = getGradebookService().isWeightedMarks(lessonId);
-	Double learnerLessonMark = getGradebookService().getGradebookUserLesson(lessonId, userId).getMark();
-	resultJSON.put("learnerLessonMark", learnerLessonMark == null ? GradebookConstants.CELL_EMPTY
-		: GradebookUtil.niceFormatting(learnerLessonMark, isWeighted));
+	GradebookUserLesson gradebookUserLesson = getGradebookService().getGradebookUserLesson(lessonId, userId);
+	resultJSON.put("learnerLessonMark",
+		gradebookUserLesson == null || gradebookUserLesson.getMark() == null ? GradebookConstants.CELL_EMPTY
+			: GradebookUtil.niceFormatting(gradebookUserLesson.getMark(), isWeighted));
 	Double averageLessonMark = getGradebookService().getAverageMarkForLesson(lessonId);
 	resultJSON.put("averageLessonMark", averageLessonMark == null ? GradebookConstants.CELL_EMPTY
 		: GradebookUtil.niceFormatting(averageLessonMark, isWeighted));