diff -urN ../roundcubemail-1.2.0.orig/program/lib/Roundcube/rcube_ldap.php ./program/lib/Roundcube/rcube_ldap.php
--- ../roundcubemail-1.2.0.orig/program/lib/Roundcube/rcube_ldap.php	2016-05-22 14:06:47.000000000 +0300
+++ ./program/lib/Roundcube/rcube_ldap.php	2016-06-14 01:02:51.000000000 +0300
@@ -1446,7 +1446,7 @@
         if ($this->is_group_entry($rec)) {
             $out['_type'] = 'group';
             $out['readonly'] = true;
-            $fieldmap['name'] = $this->group_data['name_attr'] ?: $this->prop['groups']['name_attr'];
+            $fieldmap['name'] = $this->group_data['name_attr'] ?: ($this->prop['groups']['name_attr'] ? $this->prop['groups']['name_attr'] : $fieldmap['name']);
         }
 
         // assign object type from object class mapping