diff --git a/classes/studyplan.php b/classes/studyplan.php
index 437342a..beeb8b8 100644
--- a/classes/studyplan.php
+++ b/classes/studyplan.php
@@ -671,7 +671,7 @@ class studyplan {
         $sql = "SELECT s.id FROM {local_treestudyplan} s
                 INNER JOIN {local_treestudyplan_cohort} j ON j.studyplan_id = s.id
                 INNER JOIN {cohort_members} cm ON j.cohort_id = cm.cohortid
-                INNER JOIN {user} u ON cm.userid = user.id
+                INNER JOIN {user} u ON cm.userid = u.id
                 WHERE cm.userid = :userid AND u.deleted != 1";
         $cohortplanids = $DB->get_fieldset_sql($sql, ['userid' => $userid]);
 
@@ -705,7 +705,7 @@ class studyplan {
         $sql = "SELECT COUNT(s.id) FROM {local_treestudyplan} s
                 INNER JOIN {local_treestudyplan_cohort} j ON j.studyplan_id = s.id
                 INNER JOIN {cohort_members} cm ON j.cohort_id = cm.cohortid
-                INNER JOIN {user} u ON cm.userid = user.id
+                INNER JOIN {user} u ON cm.userid = u.id
                 WHERE cm.userid = :userid  AND u.deleted != 1";
         $count += $DB->count_records_sql($sql, ['userid' => $userid]);
 
@@ -759,7 +759,7 @@ class studyplan {
             // Next het users linked though cohort.
             $sql = "SELECT cm.userid FROM {local_treestudyplan_cohort} j
                     INNER JOIN {cohort_members} cm ON j.cohort_id = cm.cohortid
-                    INNER JOIN {user} u ON cm.userid = user.id
+                    INNER JOIN {user} u ON cm.userid = u.id
                     WHERE j.studyplan_id = :planid AND u.deleted != 1";
             $ulist = $DB->get_fieldset_sql($sql, ['planid' => $this->id]);