2 files changed, 1 insertions, 7 deletions

diff --git a/src/ext/Iis/wixext/IIsExtensionData.cs b/src/ext/Iis/wixext/IIsExtensionData.cs
index 6a0e1f09..ccbe362d 100644
--- a/src/ext/Iis/wixext/IIsExtensionData.cs
+++ b/src/ext/Iis/wixext/IIsExtensionData.cs
@@ -10,12 +10,6 @@ namespace WixToolset.Iis
     /// </summary>
     public sealed class IIsExtensionData : BaseExtensionData
     {
-        /// <summary>
-        /// Gets the default culture.
-        /// </summary>
-        /// <value>The default culture.</value>
-        public override string DefaultCulture => "en-US";
-
         public override bool TryGetSymbolDefinitionByName(string name, out IntermediateSymbolDefinition symbolDefinition)
         {
             symbolDefinition = IisSymbolDefinitions.ByName(name);
diff --git a/src/ext/Iis/wixlib/en-us.wxl b/src/ext/Iis/wixlib/en-us.wxl
index 1b6096fb..65bc1435 100644
--- a/src/ext/Iis/wixlib/en-us.wxl
+++ b/src/ext/Iis/wixlib/en-us.wxl
@@ -1,7 +1,7 @@
 <!-- Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information. -->
 
 
-<WixLocalization Culture="en-us" xmlns="http://wixtoolset.org/schemas/v4/wxl">
+<WixLocalization Culture="en-us" ExtensionDefaultCulture="yes" xmlns="http://wixtoolset.org/schemas/v4/wxl">
     <String Id="msierrIISCannotConnect" Overridable="yes" Value="Cannot connect to Internet Information Server.  ([2]   [3]   [4]   [5])" />
     <String Id="msierrIISFailedReadWebSite" Overridable="yes" Value="Failed while processing WebSites.   ([2]   [3]   [4]   [5])" />
     <String Id="msierrIISFailedReadWebDirs" Overridable="yes" Value="Failed while processing WebDirs.  ([2]   [3]   [4]   [5])" />