--- libaitsched/src/tasks.c	2012/08/02 12:19:29	1.10.2.8
+++ libaitsched/src/tasks.c	2012/08/02 12:32:07	1.10.2.9
@@ -3,7 +3,7 @@
 *  by Michael Pounov <misho@openbsd-bg.org>
 *
 * $Author: misho $
-* $Id: tasks.c,v 1.10.2.8 2012/08/02 12:19:29 misho Exp $
+* $Id: tasks.c,v 1.10.2.9 2012/08/02 12:32:07 misho Exp $
 *
 **************************************************************************
 The ELWIX and AITNET software is distributed under the following
@@ -482,7 +482,7 @@ schedAlarm(sched_root_task_t * __restrict root, sched_
 	return task;
 }
 
-#ifdef EVFILT_AIO
+#if defined(EVFILT_AIO) && defined(SIGEV_KEVENT)
 /*
  * schedAIO() - Add AIO task to scheduler queue
  *