Index: uspace/lib/usbdev/include/usb/dev/dp.h
===================================================================
--- uspace/lib/usbdev/include/usb/dev/dp.h	(revision 7d2046152a8b44545f4f4cbedd5dcf175eeffdf2)
+++ uspace/lib/usbdev/include/usb/dev/dp.h	(revision 25effe26f10a7a924b0423a3ec0d2dfc9580dad2)
@@ -79,6 +79,6 @@
     const usb_dp_parser_data_t *, const uint8_t *, const uint8_t *);
 
-void usb_dp_walk_simple(uint8_t *, size_t, const usb_dp_descriptor_nesting_t *,
-    walk_callback_t, void *);
+void usb_dp_walk_simple(const uint8_t *, size_t,
+    const usb_dp_descriptor_nesting_t *, walk_callback_t, void *);
 
 #endif
Index: uspace/lib/usbdev/src/devdrv.c
===================================================================
--- uspace/lib/usbdev/src/devdrv.c	(revision 7d2046152a8b44545f4f4cbedd5dcf175eeffdf2)
+++ uspace/lib/usbdev/src/devdrv.c	(revision 25effe26f10a7a924b0423a3ec0d2dfc9580dad2)
@@ -554,5 +554,4 @@
 	}
 	return usb_dev;
-
 }
 
Index: uspace/lib/usbdev/src/dp.c
===================================================================
--- uspace/lib/usbdev/src/dp.c	(revision 7d2046152a8b44545f4f4cbedd5dcf175eeffdf2)
+++ uspace/lib/usbdev/src/dp.c	(revision 25effe26f10a7a924b0423a3ec0d2dfc9580dad2)
@@ -304,5 +304,5 @@
  * @param arg Custom (user) argument.
  */
-void usb_dp_walk_simple(uint8_t *descriptors, size_t descriptors_size,
+void usb_dp_walk_simple(const uint8_t *descriptors, size_t descriptors_size,
     const usb_dp_descriptor_nesting_t *descriptor_nesting,
     walk_callback_t callback, void *arg)