--- libaitsched/src/hooks.c	2022/11/28 23:06:06	1.37.2.1
+++ libaitsched/src/hooks.c	2022/11/28 23:48:33	1.37.2.3
@@ -3,7 +3,7 @@
 *  by Michael Pounov <misho@openbsd-bg.org>
 *
 * $Author: misho $
-* $Id: hooks.c,v 1.37.2.1 2022/11/28 23:06:06 misho Exp $
+* $Id: hooks.c,v 1.37.2.3 2022/11/28 23:48:33 misho Exp $
 *
 **************************************************************************
 The ELWIX and AITNET software is distributed under the following
@@ -537,7 +537,7 @@ sched_hook_read(void *task, void *arg)
 {
 	sched_task_t *t = task;
 	sched_root_task_t *r = NULL;
-	intptr_t mask = (intptr_t) arg;
+	uintptr_t mask = (uintptr_t) arg;
 #if SUP_ENABLE == KQ_SUPPORT
 	struct kevent chg[1];
 	struct timespec timeout = { 0, 0 };
@@ -553,9 +553,11 @@ sched_hook_read(void *task, void *arg)
 
 #if SUP_ENABLE == KQ_SUPPORT
 #ifdef __NetBSD__
-	EV_SET(&chg[0], TASK_FD(t), EVFILT_READ, EV_ADD | EV_CLEAR, 0, 0, (intptr_t) TASK_FD(t));
+	EV_SET(&chg[0], TASK_FD(t), EVFILT_READ, EV_ADD | EV_CLEAR | mask, 
+			0, 0, (intptr_t) TASK_FD(t));
 #else
-	EV_SET(&chg[0], TASK_FD(t), EVFILT_READ, EV_ADD | EV_CLEAR, 0, 0, (void*) TASK_FD(t));
+	EV_SET(&chg[0], TASK_FD(t), EVFILT_READ, EV_ADD | EV_CLEAR | mask, 
+			0, 0, (void*) TASK_FD(t));
 #endif
 	if (kevent(r->root_kq, chg, 1, NULL, 0, &timeout) == -1) {
 		if (r->root_hooks.hook_exec.exception)