--- libaitsched/src/aitsched.c	2012/05/31 21:36:40	1.9.2.2
+++ libaitsched/src/aitsched.c	2012/05/31 21:48:01	1.9.2.3
@@ -3,7 +3,7 @@
 *  by Michael Pounov <misho@openbsd-bg.org>
 *
 * $Author: misho $
-* $Id: aitsched.c,v 1.9.2.2 2012/05/31 21:36:40 misho Exp $
+* $Id: aitsched.c,v 1.9.2.3 2012/05/31 21:48:01 misho Exp $
 *
 **************************************************************************
 The ELWIX and AITNET software is distributed under the following
@@ -309,6 +309,10 @@ schedFetch(sched_root_task_t * __restrict root)
 int
 schedTrigger(sched_task_t * __restrict task)
 {
+#ifndef EVFILT_USER
+	sched_SetErr(ENOTSUP, "Not supported kevent() filter");
+	return -1;
+#else
 	struct kevent chg[1];
 	struct timespec timeout = { 0, 0 };
 
@@ -326,6 +330,7 @@ schedTrigger(sched_task_t * __restrict task)
 	}
 
 	return 0;
+#endif
 }
 
 /*