Index: uspace/lib/drv/include/usb_iface.h
===================================================================
--- uspace/lib/drv/include/usb_iface.h	(revision 6610565b4f069eca9d1d17e21f317196b1a98756)
+++ uspace/lib/drv/include/usb_iface.h	(revision ec293a8d0aa0085cc90df7f82c25a5a08fbbbc59)
@@ -27,5 +27,6 @@
  */
 
-/** @addtogroup libdrv usb
+/** @addtogroup libdrv
+ * @addtogroup usb
  * @{
  */
Index: uspace/lib/drv/include/usbhc_iface.h
===================================================================
--- uspace/lib/drv/include/usbhc_iface.h	(revision 6610565b4f069eca9d1d17e21f317196b1a98756)
+++ uspace/lib/drv/include/usbhc_iface.h	(revision ec293a8d0aa0085cc90df7f82c25a5a08fbbbc59)
@@ -27,5 +27,6 @@
  */
 
-/** @addtogroup libdrv usb
+/** @addtogroup libdrv
+ * @addtogroup usb
  * @{
  */