diff --git a/hw/arm/smmuv3.c b/hw/arm/smmuv3.c
index 3971976389..4c49b5a885 100644
--- a/hw/arm/smmuv3.c
+++ b/hw/arm/smmuv3.c
@@ -1981,6 +1981,7 @@ static Property smmuv3_properties[] = {
      * Stages of translation advertised.
      * "1": Stage 1
      * "2": Stage 2
+     * "nested": Both stage 1 and stage 2
      * Defaults to stage 1
      */
     DEFINE_PROP_STRING("stage", SMMUv3State, stage),