diff --git a/utils/tcctool/tcctool-driver-win32/tcc.inf b/utils/tcctool/tcctool-driver-win32/tcc.inf
index c34a576f4c..4ab3450a46 100644
--- a/utils/tcctool/tcctool-driver-win32/tcc.inf
+++ b/utils/tcctool/tcctool-driver-win32/tcc.inf
@@ -122,16 +122,19 @@ ServiceBinary  = %12%\libusb0.sys
 "TCC77x usb-boot mode"=LIBUSB_DEV, USB\VID_140E&PID_B021
 "TCC7801 usb-boot mode"=LIBUSB_DEV, USB\VID_140E&PID_B011
 "TCC8200 usb-boot mode"=LIBUSB_DEV, USB\VID_140E&PID_B051
+"TCC7901 usb-boot mode"=LIBUSB_DEV, USB\VID_140E&PID_B057
 
 [Devices.NT]
 "TCC77x usb-boot mode"=LIBUSB_DEV, USB\VID_140E&PID_B021
 "TCC7801 usb-boot mode"=LIBUSB_DEV, USB\VID_140E&PID_B011
 "TCC8200 usb-boot mode"=LIBUSB_DEV, USB\VID_140E&PID_B051
+"TCC7901 usb-boot mode"=LIBUSB_DEV, USB\VID_140E&PID_B057
 
 [Devices.NTAMD64]
 "TCC77x usb-boot mode"=LIBUSB_DEV, USB\VID_140E&PID_B021
 "TCC7801 usb-boot mode"=LIBUSB_DEV, USB\VID_140E&PID_B011
 "TCC8200 usb-boot mode"=LIBUSB_DEV, USB\VID_140E&PID_B051
+"TCC7901 usb-boot mode"=LIBUSB_DEV, USB\VID_140E&PID_B057
 
 
 ;--------------------------------------------------------------------------
diff --git a/utils/tcctool/tcctool.c b/utils/tcctool/tcctool.c
index 9c5222603d..a1d1b70dbc 100644
--- a/utils/tcctool/tcctool.c
+++ b/utils/tcctool/tcctool.c
@@ -57,6 +57,7 @@ static struct device_t devices[] =
     {"c100",     "Sansa C100 series",            0xb021, 0x20000000, 0x42e97010 },
     {"m200",     "Sansa M200 series",            0xb021, 0x20000000, 0x42e97010 },
     {"cowond2",  "Cowon D2",                     0xb011, 0x20000000, 0xa2e92010 },
+    {"cowons9",  "Cowon S9",                     0xb057, 0x20000000, 0xa1102800 },
     {"iaudio6",  "iAudio 6",                     0xb021, 0x20000000, 0x62e97010 },
     {"iaudio7",  "iAudio 7",                     0xb021, 0x20000000, 0x62e97010 },
     {"logikdax", "Logik DAX 1GB DAB/MP3 player", 0xb021, 0x20000000, 0x52e97410 },