diff --git a/src/ppp-manager/nm-ppp-manager.c b/src/ppp-manager/nm-ppp-manager.c
index 73fd1ed..6907bbe 100644
--- a/src/ppp-manager/nm-ppp-manager.c
+++ b/src/ppp-manager/nm-ppp-manager.c
@@ -807,16 +807,14 @@ create_pppd_cmd_line (NMPPPManager *self,
 	/* Always ask for DNS, we don't have to use them if the connection
 	 * overrides the returned servers.
 	 */
-	nm_cmd_line_add_string (cmd, "usepeerdns");
-
 	if (nm_setting_ppp_get_mru (setting)) {
 		nm_cmd_line_add_string (cmd, "mru");
-		nm_cmd_line_add_int (cmd, nm_setting_ppp_get_mru (setting));
+		nm_cmd_line_add_int (cmd, 1452);
 	}
 
 	if (nm_setting_ppp_get_mtu (setting)) {
 		nm_cmd_line_add_string (cmd, "mtu");
-		nm_cmd_line_add_int (cmd, nm_setting_ppp_get_mtu (setting));
+		nm_cmd_line_add_int (cmd, 1452);
 	}
 
 	nm_cmd_line_add_string (cmd, "lcp-echo-failure");