diff --git a/apps/user_ldap/lib/User_Proxy.php b/apps/user_ldap/lib/User_Proxy.php
index 934bed7d45047..9fcd9548f735e 100644
--- a/apps/user_ldap/lib/User_Proxy.php
+++ b/apps/user_ldap/lib/User_Proxy.php
@@ -415,12 +415,7 @@ public function countUsers() {
 	 */
 	public function countMappedUsers(): int {
 		$this->setup();
-
-		$users = 0;
-		foreach ($this->backends as $backend) {
-			$users += $backend->countMappedUsers();
-		}
-		return $users;
+		return $this->refBackend?->countMappedUsers() ?? 0;
 	}
 
 	/**