Index: uspace/lib/usbdev/include/usb/dev/pipes.h
===================================================================
--- uspace/lib/usbdev/include/usb/dev/pipes.h	(revision bbce2c219ee90a62d234a3ddd1cce80b1758a294)
+++ uspace/lib/usbdev/include/usb/dev/pipes.h	(revision b3433a25a941b012b6e8e37fa2c00a8e4e2ea6ee)
@@ -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 bbce2c219ee90a62d234a3ddd1cce80b1758a294)
+++ uspace/lib/usbdev/src/pipesio.c	(revision b3433a25a941b012b6e8e37fa2c00a8e4e2ea6ee)
@@ -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)
 {