diff --git a/app/extensions/resources/classes/extension.php b/app/extensions/resources/classes/extension.php
index d65949048d..c7e4cab3af 100644
--- a/app/extensions/resources/classes/extension.php
+++ b/app/extensions/resources/classes/extension.php
@@ -90,13 +90,13 @@ if (!class_exists('extension')) {
 			}
 		}
 
-		public function exists($extension) {
+		public function exists($domain_uuid, $extension) {
 			$sql = "select extension_uuid from v_extensions ";
 			$sql .= "where domain_uuid = :domain_uuid ";
 			$sql .= "and (extension = :extension or number_alias = :extension) ";
 			$sql .= "and enabled = 'true' ";
 			$prep_statement = $this->db->prepare($sql);
-			$prep_statement->bindParam(':domain_uuid', $this->domain_uuid);
+			$prep_statement->bindParam(':domain_uuid', $domain_uuid);
 			$prep_statement->bindParam(':extension', $extension);
 			$prep_statement->execute();
 			$result = $prep_statement->fetchAll(PDO::FETCH_NAMED);