diff --git a/system-settings/plugins/ifcfg-rh/writer.c b/system-settings/plugins/ifcfg-rh/writer.c
index 330bbf044e..74f3a59a56 100644
--- a/system-settings/plugins/ifcfg-rh/writer.c
+++ b/system-settings/plugins/ifcfg-rh/writer.c
@@ -807,6 +807,7 @@ write_wired_setting (NMConnection *connection, shvarFile *ifcfg, GError **error)
 		g_free (tmp);
 	}
 
+	svSetValue (ifcfg, "MTU", NULL, FALSE);
 	mtu = nm_setting_wired_get_mtu (s_wired);
 	if (mtu) {
 		tmp = g_strdup_printf ("%u", mtu);