diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
index fb6c6109fdca..4944136efaa2 100644
--- a/include/linux/kvm_host.h
+++ b/include/linux/kvm_host.h
@@ -664,7 +664,7 @@ struct kvm_irq_routing_table {
 	 * Array indexed by gsi. Each entry contains list of irq chips
 	 * the gsi is connected to.
 	 */
-	struct hlist_head map[];
+	struct hlist_head map[] __counted_by(nr_rt_entries);
 };
 #endif