Index: uspace/lib/usbhid/include/usb/hid/iface.h
===================================================================
--- uspace/lib/usbhid/include/usb/hid/iface.h	(revision 266fcd8c981896a0b7c0c891dd44612adb7e6f96)
+++ uspace/lib/usbhid/include/usb/hid/iface.h	(revision 18783860abf4bec75bcd134c99e301cc50d280e8)
@@ -37,10 +37,12 @@
 
 #include <sys/types.h>
+#include <async.h>
 
-int usbhid_dev_get_event_length(int, size_t *);
-int usbhid_dev_get_event(int, uint8_t *, size_t, size_t *, int *,
-    unsigned int);
-int usbhid_dev_get_report_descriptor_length(int, size_t *);
-int usbhid_dev_get_report_descriptor(int, uint8_t *, size_t, size_t *);
+extern int usbhid_dev_get_event_length(async_sess_t *, size_t *);
+extern int usbhid_dev_get_event(async_sess_t *, uint8_t *, size_t, size_t *,
+    int *, unsigned int);
+extern int usbhid_dev_get_report_descriptor_length(async_sess_t *, size_t *);
+extern int usbhid_dev_get_report_descriptor(async_sess_t *, uint8_t *, size_t,
+    size_t *);
 
 #endif