diff --git a/etc/inc/upgrade_config.inc b/etc/inc/upgrade_config.inc
index af0f15feea..ce0a16b6ce 100644
--- a/etc/inc/upgrade_config.inc
+++ b/etc/inc/upgrade_config.inc
@@ -1980,6 +1980,8 @@ function upgrade_063_to_064() {
 			if (!isset($ppp['ptpid'])){
 				$config['ppps']['ppp'][$pppid]['ptpid'] = uniqid('', true);
 			}
+			if (isset($ppp['defaultgw'])){
+				unset($config['ppps']['ppp'][$pppid]['defaultgw']);
 		}
 	}