diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index 02e98f3131bda11433fd0081752bcb9be350afb5..48bd520fc702c9e0aa812df6b93d564872f42848 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -2941,7 +2941,7 @@ static long kvm_vm_ioctl(struct file *filp,
 		if (copy_from_user(&routing, argp, sizeof(routing)))
 			goto out;
 		r = -EINVAL;
-		if (routing.nr >= KVM_MAX_IRQ_ROUTES)
+		if (routing.nr > KVM_MAX_IRQ_ROUTES)
 			goto out;
 		if (routing.flags)
 			goto out;