diff --git a/atusb/fw/usb/usb.h b/atusb/fw/usb/usb.h
index 633b8df..32d8ad7 100644
--- a/atusb/fw/usb/usb.h
+++ b/atusb/fw/usb/usb.h
@@ -68,6 +68,15 @@
 #define	USB_ATTR_SELF_POWERED	0x40
 #define	USB_ATTR_REMOTE_WAKEUP	0x20
 
+/*
+ * Endpoint type
+ */
+
+#define	USB_ENDPOINT_TYPE_CONTROL	0
+#define	USB_ENDPOINT_TYPE_ISOCHRONOUS	1
+#define	USB_ENDPOINT_TYPE_BULK		2
+#define	USB_ENDPOINT_TYPE_INTERRUPT	3
+
 /*
  * Setup request types
  */