diff --git a/ATxCommon/StorageStatus.cs b/ATxCommon/StorageStatus.cs
index c5a4a439a4eea0ac3a3f560e7c90d7b1979ceca0..50024965b709c4f0b744dfe41da2766d07b91567 100644
--- a/ATxCommon/StorageStatus.cs
+++ b/ATxCommon/StorageStatus.cs
@@ -41,7 +41,7 @@ namespace ATxCommon
         }
 
         /// <summary>
-        /// Number of expired directories in the grace location.
+        /// Number of expired (1st-level) directories in the grace location.
         /// </summary>
         public int ExpiredDirsCount {
             get {