Index: uspace/lib/usbdev/include/usb/dev/pipes.h
===================================================================
--- uspace/lib/usbdev/include/usb/dev/pipes.h	(revision 113093acc09c5a790552b36471ec41a2e5bba71c)
+++ uspace/lib/usbdev/include/usb/dev/pipes.h	(revision bf73a0275cfecb7c3ff121a201c250829d4d3ca6)
@@ -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,
Index: uspace/lib/usbdev/src/pipesio.c
===================================================================
--- uspace/lib/usbdev/src/pipesio.c	(revision 113093acc09c5a790552b36471ec41a2e5bba71c)
+++ uspace/lib/usbdev/src/pipesio.c	(revision bf73a0275cfecb7c3ff121a201c250829d4d3ca6)
@@ -328,5 +328,5 @@
  */
 static int usb_pipe_control_read_no_check(usb_pipe_t *pipe,
-    void *setup_buffer, size_t setup_buffer_size,
+    const void *setup_buffer, size_t setup_buffer_size,
     void *data_buffer, size_t data_buffer_size, size_t *data_transfered_size)
 {
@@ -411,5 +411,5 @@
  */
 int usb_pipe_control_read(usb_pipe_t *pipe,
-    void *setup_buffer, size_t setup_buffer_size,
+    const void *setup_buffer, size_t setup_buffer_size,
     void *data_buffer, size_t data_buffer_size, size_t *data_transfered_size)
 {