Index: uspace/lib/usbdev/include/usb/dev/pipes.h
===================================================================
--- uspace/lib/usbdev/include/usb/dev/pipes.h	(revision 32ec567100de28432275d239d22a7f71e40208f8)
+++ uspace/lib/usbdev/include/usb/dev/pipes.h	(revision 03f4acf5654704475729ead26a4f10b913366ead)
@@ -185,6 +185,6 @@
 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,
-    void *, size_t);
+int usb_pipe_control_write(usb_pipe_t *, const void *, size_t,
+    const void *, size_t);
 
 #endif