diff --git a/src/UriBuilder.Fluent/TerribleDevUriExtensions.cs b/src/UriBuilder.Fluent/TerribleDevUriExtensions.cs
index 466c374..9b9b004 100644
--- a/src/UriBuilder.Fluent/TerribleDevUriExtensions.cs
+++ b/src/UriBuilder.Fluent/TerribleDevUriExtensions.cs
@@ -22,6 +22,7 @@ namespace System
         /// </summary>
         /// <param name="bld"></param>
         /// <param name="parameterDictionary"></param>
+        /// <exception cref="ArgumentNullException"></exception>
         /// <returns></returns>
         public static UriBuilder WithParameter(this UriBuilder bld, IDictionary<string, string> parameterDictionary)
         {