Index: uspace/lib/usbdev/include/usb/dev/pipes.h
===================================================================
--- uspace/lib/usbdev/include/usb/dev/pipes.h	(revision 79ae36ddc409577eb0da3750b3a7280e034566a2)
+++ uspace/lib/usbdev/include/usb/dev/pipes.h	(revision aff1880223dc65a807007d2fbf259e14f2baa53d)
@@ -183,5 +183,5 @@
 int usb_pipe_write(usb_pipe_t *, void *, size_t);
 
-int usb_pipe_control_read(usb_pipe_t *, void *, size_t,
+int usb_pipe_control_read(usb_pipe_t *, const void *, size_t,
     void *, size_t, size_t *);
 int usb_pipe_control_write(usb_pipe_t *, void *, size_t,