diff --git a/Storage/Storage/Public/LCObject.cs b/Storage/Storage/Public/LCObject.cs
index 61be51c..623af16 100644
--- a/Storage/Storage/Public/LCObject.cs
+++ b/Storage/Storage/Public/LCObject.cs
@@ -138,7 +138,7 @@ namespace LeanCloud.Storage {
         /// Gets or sets a value on the object. It is forbidden to name keys
         /// with a leading underscore ('_').
         /// </summary>
-        /// <param name="key">The value for key.</param>
+        /// <param name="key">The name of a key.</param>
         /// <returns></returns>
         public object this[string key] {
             get {