diff --git a/build/NuSpecs/tools/Web.config.install.xdt b/build/NuSpecs/tools/Web.config.install.xdt
index 490ad4eefc..e5a0262103 100644
--- a/build/NuSpecs/tools/Web.config.install.xdt
+++ b/build/NuSpecs/tools/Web.config.install.xdt
@@ -66,6 +66,7 @@
         <add assembly="System.Net.Http, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" xdt:Locator="Match(assembly)"
     xdt:Transform="InsertIfMissing" />
         <add assembly="System.Web.Http, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" xdt:Locator="Match(assembly)" xdt:Transform="InsertIfMissing" />
+        <add assembly="System.Runtime, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" xdt:Locator="Match(assembly)" xdt:Transform="InsertIfMissing" />
         <add assembly="System.Design, Version=4.0.0.0, Culture=neutral, PublicKeyToken=B03F5F7F11D50A3A" xdt:Locator="Match(assembly)" xdt:Transform="Remove" />
         <add assembly="System.Core, Version=4.0.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089" xdt:Locator="Match(assembly)" xdt:Transform="Remove" />
         <add assembly="System.Web.Extensions, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" xdt:Locator="Match(assembly)" xdt:Transform="Remove" />
@@ -84,10 +85,12 @@
       <assemblies>
         <remove assembly="System.Web.Http" xdt:Locator="Match(assembly)" xdt:Transform="Remove" />
         <remove assembly="System.Net.Http" xdt:Locator="Match(assembly)" xdt:Transform="Remove" />
+        <remove assembly="System.Runtime" xdt:Locator="Match(assembly)" xdt:Transform="Remove" />
       </assemblies>
       <assemblies>
         <remove assembly="System.Web.Http" xdt:Locator="Match(assembly)" xdt:Transform="InsertBefore(/configuration/system.web/compilation/assemblies/add)" />
         <remove assembly="System.Net.Http" xdt:Locator="Match(assembly)" xdt:Transform="InsertBefore(/configuration/system.web/compilation/assemblies/add)" />
+        <remove assembly="System.Runtime" xdt:Locator="Match(assembly)" xdt:Transform="InsertBefore(/configuration/system.web/compilation/assemblies/add)" />
       </assemblies>
     </compilation>