Index: uspace/lib/usb/include/usb/host/usb_endpoint_manager.h
===================================================================
--- uspace/lib/usb/include/usb/host/usb_endpoint_manager.h	(revision f0891ceffb99cfd7adae2b8dfc5798bcc7f0b54f)
+++ uspace/lib/usb/include/usb/host/usb_endpoint_manager.h	(revision 97834967aae0e239a26e1a709766dbd30e680159)
@@ -64,6 +64,5 @@
 int usb_endpoint_manager_register_ep(usb_endpoint_manager_t *instance,
     usb_address_t address, usb_endpoint_t ep, usb_direction_t direction,
-    void *data, void (*data_remove_callback)(void* data, void* arg), void *arg,
-    size_t bw);
+    void *data, void (*data_remove_callback)(void* data), size_t bw);
 
 int usb_endpoint_manager_register_ep_wait(usb_endpoint_manager_t *instance,