diff --git a/backuplib.php b/backuplib.php
index a5c1545..0c36cc7 100644
--- a/backuplib.php
+++ b/backuplib.php
@@ -108,6 +108,7 @@
                 //Print contents
                 fwrite ($bf,full_tag('ID',6,false,$item->id));
                 fwrite ($bf,full_tag('COURSEID',6,false,$item->courseid));
+                fwrite ($bf,full_tag('GROUPID',6,false,$item->groupid));
                 fwrite ($bf,full_tag('SESSDATE',6,false,$item->sessdate));
                 fwrite ($bf,full_tag('DURATION',6,false,$item->duration));
                 fwrite ($bf,full_tag('TIMEMODIFIED',6,false,$item->timemodified));
diff --git a/restorelib.php b/restorelib.php
index 79a22c1..26320ad 100644
--- a/restorelib.php
+++ b/restorelib.php
@@ -67,6 +67,11 @@
             //Now, build the attforblock_SESSIONS record structure
 
             $stat->courseid = $restore->course_id;
+            $stat->groupid = backup_todb($stat_info['#']['GROUPID']['0']['#']);
+            $group = restore_group_getid($restore, $stat->groupid);
+            if ($group) {
+                $stat->groupid = $group->new_id;
+            }
 //            $stat->creator = backup_todb($stat_info['#']['CREATOR']['0']['#']);
             $stat->sessdate = backup_todb($stat_info['#']['SESSDATE']['0']['#']);
             $stat->timemodified = backup_todb($stat_info['#']['TIMEMODIFIED']['0']['#']);