diff --git a/lam/lib/modules/posixGroup.inc b/lam/lib/modules/posixGroup.inc
index c70eca41..497dd9c0 100644
--- a/lam/lib/modules/posixGroup.inc
+++ b/lam/lib/modules/posixGroup.inc
@@ -442,11 +442,16 @@ class posixGroup extends baseModule implements passwordService {
 	* @return array list of possible PDF entries
 	*/
 	function get_pdfEntries() {
+		$members = '';
+		if (isset($this->attributes['memberUid'][0])) {
+			$members = implode(', ', $this->attributes['memberUid']);
+		}
 		return array(
-		get_class($this) . '_cn' => array('<block><key>' . _('Group name') . '</key><value>' . $this->attributes['cn'][0] . '</value></block>'),
-		get_class($this) . '_gidNumber' => array('<block><key>' . _('GID number') . '</key><value>' . $this->attributes['gidNumber'][0] . '</value></block>'),
-		get_class($this) . '_memberUid' => array('<block><key>' . _('Group members') . '</key><value>' . implode(', ', $this->attributes['memberUid']) . '</value></block>'),
-		get_class($this) . '_description' => array('<block><key>' . _('Description') . '</key><value>' . $this->attributes['description'][0] . '</value></block>'));
+			get_class($this) . '_cn' => array('<block><key>' . _('Group name') . '</key><value>' . $this->attributes['cn'][0] . '</value></block>'),
+			get_class($this) . '_gidNumber' => array('<block><key>' . _('GID number') . '</key><value>' . $this->attributes['gidNumber'][0] . '</value></block>'),
+			get_class($this) . '_memberUid' => array('<block><key>' . _('Group members') . '</key><value>' . $members . '</value></block>'),
+			get_class($this) . '_description' => array('<block><key>' . _('Description') . '</key><value>' . $this->attributes['description'][0] . '</value></block>')
+		);
 	}