diff --git a/src/Spring/Spring.Web.Mvc4/Spring.Web.Mvc4.build b/src/Spring/Spring.Web.Mvc4/Spring.Web.Mvc4.build
index 4b7b38b9..16bbf7e4 100644
--- a/src/Spring/Spring.Web.Mvc4/Spring.Web.Mvc4.build
+++ b/src/Spring/Spring.Web.Mvc4/Spring.Web.Mvc4.build
@@ -35,6 +35,8 @@
 				<include name="Spring.Web.dll" />
 				<include name="System.Configuration.dll" />
  				<include name="System.Web.dll" />
+				<include name="System.Web.Http" />				
+				<include name="System.Web.Http.WebHost" />				
 				<include name="System.Web.Routing.dll"/>
 				<include name="System.Web.Abstractions.dll"/>
  				<include name="System.Web.Services.dll" />
diff --git a/test/Spring/Spring.Web.Mvc4.Tests/Spring.Web.Mvc4.Tests.build b/test/Spring/Spring.Web.Mvc4.Tests/Spring.Web.Mvc4.Tests.build
index 2e652102..c858fb82 100644
--- a/test/Spring/Spring.Web.Mvc4.Tests/Spring.Web.Mvc4.Tests.build
+++ b/test/Spring/Spring.Web.Mvc4.Tests/Spring.Web.Mvc4.Tests.build
@@ -45,6 +45,9 @@
 				
 				<include name="System.Web.Abstractions.dll"/>
 				<include name="System.Web.Routing.dll"/>
+				
+				<include name="System.Web.Http" />
+				<include name="System.Web.Http.WebHost" />
 
 				<include name="C:\Program Files\Microsoft ASP.NET\ASP.NET MVC 4\Assemblies\System.Web.Mvc.dll" />
 				<include name="C:\Program Files (x86)\Microsoft ASP.NET\ASP.NET MVC 4\Assemblies\System.Web.Mvc.dll" />