diff --git a/lib/private/group/group.php b/lib/private/group/group.php
index 3e245ab6bbe8062c208563851921385666a4583d..e0a359248547c7ac2589e976b4e4108870bba5cb 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)) {