diff --git a/docs/virtio-balloon-stats.txt b/docs/virtio-balloon-stats.txt
index edff5f22a8..7a66d25da5 100644
--- a/docs/virtio-balloon-stats.txt
+++ b/docs/virtio-balloon-stats.txt
@@ -32,6 +32,8 @@ which will return a dictionary containing:
       - stat-minor-faults
       - stat-free-memory
       - stat-total-memory
+      - stat-available-memory
+      - stat-disk-caches
 
   o A key named last-update, which contains the last stats update
     timestamp in seconds. Since this timestamp is generated by the host,