diff --git a/sys/bus/u4b/usbdevs b/sys/bus/u4b/usbdevs
index fa4e5869..a1afa151 100644
--- a/sys/bus/u4b/usbdevs
+++ b/sys/bus/u4b/usbdevs
@@ -745,6 +745,7 @@ vendor TRIPPLITE	0x2478	Tripp-Lite
 vendor HIROSE		0x2631	Hirose Electric
 vendor NHJ		0x2770	NHJ
 vendor PLANEX		0x2c02	Planex Communications
+vendor MERCUSYS		0x2c4e	Mercusys
 vendor VIDZMEDIA	0x3275	VidzMedia Pte Ltd
 vendor LINKINSTRUMENTS	0x3195	Link Instruments Inc.
 vendor AEI		0x3334	AEI
@@ -3050,6 +3051,9 @@ product MELCO WLIUCGNM		0x01a2	WLI-UC-GNM
 product MELCO WLIUCG300HPV1	0x01a8	WLI-UC-G300HP-V1
 product MELCO WLIUCGNM2		0x01ee	WLI-UC-GNM2
 
+/* Mercusys products */
+product MERCUSYS MW150US	0x0102	MW150US
+
 /* Merlin products */
 product MERLIN V620             0x1110  Merlin V620
 
diff --git a/sys/bus/u4b/wlan/if_urtwn.c b/sys/bus/u4b/wlan/if_urtwn.c
index 7fec4a73..9cb9bcd8 100644
--- a/sys/bus/u4b/wlan/if_urtwn.c
+++ b/sys/bus/u4b/wlan/if_urtwn.c
@@ -192,6 +192,7 @@ static const STRUCT_USB_HOST_ID urtwn_devs[] = {
 	URTWN_RTL8188E_DEV(ELECOM,	WDC150SU2M),
 	URTWN_RTL8188E_DEV(REALTEK,	RTL8188ETV),
 	URTWN_RTL8188E_DEV(REALTEK,	RTL8188EU),
+	URTWN_RTL8188E_DEV(MERCUSYS,	MW150US),
 #undef URTWN_RTL8188E_DEV
 #undef URTWN_DEV
 };