diff --git a/lib/private/group/group.php b/lib/private/group/group.php
index 3e245ab6bbe..e0a35924854 100644
--- a/lib/private/group/group.php
+++ b/lib/private/group/group.php
@@ -186,7 +186,7 @@ class Group {
 	 * @param string $search
 	 * @return int|bool
 	 */
-	public function count($search) {
+	public function count($search = '') {
 		$users = false;
 		foreach ($this->backends as $backend) {
 			if($backend->implementsActions(OC_GROUP_BACKEND_COUNT_USERS)) {