diff --git a/sys/src/cmd/nusb/serial/ftdi.c b/sys/src/cmd/nusb/serial/ftdi.c
index 1b1e88722..3affcf39f 100644
--- a/sys/src/cmd/nusb/serial/ftdi.c
+++ b/sys/src/cmd/nusb/serial/ftdi.c
@@ -1094,6 +1094,9 @@ hasjtag(Usbdev *udev)
 	/* no string, for now, by default we detect no jtag */
 	if(udev->product != nil && cistrstr(udev->product, "jtag") != nil)
 		return 1;
+	/* blank aijuboard has jtag for initial bringup */
+	if(udev->csp == 0xffffff)
+		return 1;
 	return 0;
 }