diff --git a/src/hardware/hameg-hmo/api.c b/src/hardware/hameg-hmo/api.c
index bf46a3bb..56b95c38 100644
--- a/src/hardware/hameg-hmo/api.c
+++ b/src/hardware/hameg-hmo/api.c
@@ -22,8 +22,6 @@
 #include "scpi.h"
 #include "protocol.h"
 
-#define SERIALCOMM "115200/8n1/flow=1"
-
 static struct sr_dev_driver hameg_hmo_driver_info;
 
 static const char *manufacturers[] = {
diff --git a/src/scpi/scpi_serial.c b/src/scpi/scpi_serial.c
index 8690d6f1..90c01424 100644
--- a/src/scpi/scpi_serial.c
+++ b/src/scpi/scpi_serial.c
@@ -35,6 +35,7 @@ struct scpi_serial {
 	gboolean got_newline;
 };
 
+/* Default serial port options for some known USB devices */
 static const struct {
 	uint16_t vendor_id;
 	uint16_t product_id;
@@ -42,7 +43,9 @@ static const struct {
 } scpi_serial_usb_ids[] = {
 	{ 0x0403, 0xed72, "115200/8n1/flow=1" }, /* Hameg HO720 */
 	{ 0x0403, 0xed73, "115200/8n1/flow=1" }, /* Hameg HO730 */
-	{ 0x0aad, 0x0118, "115200/8n1" },        /* R&S HMO1002 */
+	{ 0x0aad, 0x0117, "115200/8n1" },        /* R&S HMO series, previously branded as Hameg HMO */
+	{ 0x0aad, 0x0118, "115200/8n1" },        /* R&S HMO series, previously branded as Hameg HMO */
+	{ 0x0aad, 0x0119, "115200/8n1" },        /* R&S HMO series, previously branded as Hameg HMO */
 };
 
 static GSList *scpi_serial_scan(struct drv_context *drvc)