diff --git a/resources/switch.php b/resources/switch.php
index 404620b581..9e2388ee69 100644
--- a/resources/switch.php
+++ b/resources/switch.php
@@ -2732,7 +2732,12 @@ if (!function_exists('save_call_center_xml')) {
 					}
 					$v_queues .= "<queue name=\"$queue_name@".$_SESSION['domains'][$row["domain_uuid"]]['domain_name']."\">\n";
 					$v_queues .= "			<param name=\"strategy\" value=\"$queue_strategy\"/>\n";
-					$v_queues .= "			<param name=\"moh-sound\" value=\"$queue_moh_sound\"/>\n";
+					if (strlen($queue_moh_sound) == 0) {
+						$v_queues .= "			<param name=\"moh-sound\" value=\"default\"/>\n";
+					}
+					else {
+						$v_queues .= "			<param name=\"moh-sound\" value=\"$queue_moh_sound\"/>\n";
+					}
 					if (strlen($queue_record_template) > 0) {
 						$v_queues .= "			<param name=\"record-template\" value=\"$queue_record_template\"/>\n";
 					}