diff --git a/arch/x86_64/kernel/io_apic.c b/arch/x86_64/kernel/io_apic.c
index c3cdcab296884a8c92e86cfe51502a99775fedff..44b55f8338750c9b610983c12b3bcce6fa3f013b 100644
--- a/arch/x86_64/kernel/io_apic.c
+++ b/arch/x86_64/kernel/io_apic.c
@@ -660,7 +660,7 @@ static int __assign_irq_vector(int irq, cpumask_t mask, cpumask_t *result)
 		}
 		if (old_vector >= 0) {
 			int old_cpu;
-			for_each_cpu_mask(old_cpu, domain)
+			for_each_cpu_mask(old_cpu, irq_domain[irq])
 				per_cpu(vector_irq, old_cpu)[old_vector] = -1;
 		}
 		for_each_cpu_mask(new_cpu, domain)