diff --git a/arch/um/kernel/time.c b/arch/um/kernel/time.c
index 052de4c8acb2ec42c04d4fe30b267aa607e8a332..0c572a48158e8de36a18f41ce5b61e3e0ee286b5 100644
--- a/arch/um/kernel/time.c
+++ b/arch/um/kernel/time.c
@@ -56,7 +56,7 @@ static int itimer_one_shot(struct clock_event_device *evt)
 static struct clock_event_device timer_clockevent = {
 	.name			= "posix-timer",
 	.rating			= 250,
-	.cpumask		= cpu_all_mask,
+	.cpumask		= cpu_possible_mask,
 	.features		= CLOCK_EVT_FEAT_PERIODIC |
 				  CLOCK_EVT_FEAT_ONESHOT,
 	.set_state_shutdown	= itimer_shutdown,