Index: uspace/lib/wndmgt/src/wndmgt.c
===================================================================
--- uspace/lib/wndmgt/src/wndmgt.c	(revision f1f433d10ab8dfdc792a9cdc8807b76dbcfac663)
+++ uspace/lib/wndmgt/src/wndmgt.c	(revision 1099f25a41515045a6dce08ae1a53aefe7c2272b)
@@ -287,8 +287,10 @@
  *
  * @param wndmgt Window management session
+ * @param seat_id Seat ID
  * @param wnd_id Window ID
  * @return EOK on success or an error code
  */
-errno_t wndmgt_activate_window(wndmgt_t *wndmgt, sysarg_t wnd_id)
+errno_t wndmgt_activate_window(wndmgt_t *wndmgt, sysarg_t seat_id,
+    sysarg_t wnd_id)
 {
 	async_exch_t *exch;
@@ -296,5 +298,6 @@
 
 	exch = async_exchange_begin(wndmgt->sess);
-	rc = async_req_1_0(exch, WNDMGT_ACTIVATE_WINDOW, wnd_id);
+	rc = async_req_2_0(exch, WNDMGT_ACTIVATE_WINDOW, seat_id,
+	    wnd_id);
 
 	async_exchange_end(exch);