--- libaitsched/src/aitsched.c	2023/02/23 15:36:41	1.30.2.1
+++ libaitsched/src/aitsched.c	2023/02/23 15:41:45	1.30.2.3
@@ -3,7 +3,7 @@
 *  by Michael Pounov <misho@openbsd-bg.org>
 *
 * $Author: misho $
-* $Id: aitsched.c,v 1.30.2.1 2023/02/23 15:36:41 misho Exp $
+* $Id: aitsched.c,v 1.30.2.3 2023/02/23 15:41:45 misho Exp $
 *
 **************************************************************************
 The ELWIX and AITNET software is distributed under the following
@@ -389,7 +389,11 @@ schedEnd(sched_root_task_t ** __restrict root)
 
 	if ((*root)->root_sigthr) {
 		pthread_cancel((*root)->root_sigthr);
-		(*root)->root_sigthr ^= (*root)->root_sigthr;
+#ifdef __linux__
+		(*root)->root_sigthr = 0L;
+#else
+		(*root)->root_sigthr = NULL;
+#endif
 	}
 #endif
 
@@ -1152,7 +1156,11 @@ schedSignalDispatch(sched_root_task_t * __restrict roo
 
 	if (!on) {
 		pthread_cancel(root->root_sigthr);
-		root->root_sigthr ^= root->root_sigthr;
+#ifdef __linux__
+		root->root_sigthr = 0L;
+#else
+		root->root_sigthr = NULL;
+#endif
 		return 0;
 	}