diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c
index a4afe5cc5af1828a49f1005825eadc880a727088..155e3c3357a125364e538c9f6559f45f30dcd33d 100644
--- a/kernel/irq/manage.c
+++ b/kernel/irq/manage.c
@@ -852,7 +852,7 @@ irq_thread_check_affinity(struct irq_desc *desc, struct irqaction *action)
 	 * This code is triggered unconditionally. Check the affinity
 	 * mask pointer. For CPU_MASK_OFFSTACK=n this is optimized out.
 	 */
-	if (desc->irq_common_data.affinity)
+	if (cpumask_available(desc->irq_common_data.affinity))
 		cpumask_copy(mask, desc->irq_common_data.affinity);
 	else
 		valid = false;