diff --git a/tools/gen_usb_descriptor.py b/tools/gen_usb_descriptor.py
index bd77be5832..cf74001088 100644
--- a/tools/gen_usb_descriptor.py
+++ b/tools/gen_usb_descriptor.py
@@ -800,7 +800,7 @@ uint8_t const * tud_descriptor_bos_cb(void)
 }}
 
 
-#define ITF_NUM_VENOR   {webusb_interface} // used in this next descriptor
+#define ITF_NUM_VENDOR   {webusb_interface} // used in this next descriptor
 
 uint8_t const desc_ms_os_20[] =
 {{