diff --git a/src/main/java/org/olat/course/nodes/cl/manager/CheckboxManagerImpl.java b/src/main/java/org/olat/course/nodes/cl/manager/CheckboxManagerImpl.java
index e895f09ca269a57dd6dc829deb880bf0e30bb371..44e3ba813cc56de5cff76970d1627763f11be830 100644
--- a/src/main/java/org/olat/course/nodes/cl/manager/CheckboxManagerImpl.java
+++ b/src/main/java/org/olat/course/nodes/cl/manager/CheckboxManagerImpl.java
@@ -445,6 +445,7 @@ public class CheckboxManagerImpl implements CheckboxManager {
 		sb.append("select check from clcheck check")
 		  .append(" inner join fetch check.checkbox box")
 		  .append(" inner join fetch check.identity ident")
+		  .append(" inner join fetch ident.user identUser")
 		  .append(" where box.resName=:resName and box.resId=:resId");
 		if(StringHelper.containsNonWhitespace(resSubPath)) {
 			sb.append(" and box.resSubPath=:resSubPath");