diff --git a/plugins/udevng.c b/plugins/udevng.c
index 40ed2b02..4a38621b 100644
--- a/plugins/udevng.c
+++ b/plugins/udevng.c
@@ -893,6 +893,11 @@ static gboolean setup_quectel_serial(struct modem_info *modem)
 	if (value)
 		ofono_modem_set_string(modem->modem, "GpioOffset", value);
 
+	value = udev_device_get_property_value(info->dev,
+						"OFONO_QUECTEL_MUX");
+	if (value)
+		ofono_modem_set_string(modem->modem, "Mux", value);
+
 	value = udev_device_get_property_value(info->dev,
 						"OFONO_QUECTEL_RTSCTS");
 	ofono_modem_set_string(modem->modem, "RtsCts", value ? value : "off");