--- src/sys/platform/vkernel/platform/machintr.c	2007/07/02 01:47:22	1.14
+++ src/sys/platform/vkernel/platform/machintr.c	2007/08/15 03:10:50	1.15
@@ -171,7 +171,7 @@ signalintr(int intr)
 void
 cpu_disable_intr(void)
 {
-	sigblock((1 << SIGALRM) | (1 << SIGIO));
+	sigblock(sigmask(SIGALRM)|sigmask(SIGIO));
 }
 
 void