diff --git a/src/Microsoft.AspNet.Hosting/Startup/IStartupFilter.cs b/src/Microsoft.AspNet.Hosting.Abstractions/IStartupFilter.cs
similarity index 89%
rename from src/Microsoft.AspNet.Hosting/Startup/IStartupFilter.cs
rename to src/Microsoft.AspNet.Hosting.Abstractions/IStartupFilter.cs
index 79bf34401e..f89fba525c 100644
--- a/src/Microsoft.AspNet.Hosting/Startup/IStartupFilter.cs
+++ b/src/Microsoft.AspNet.Hosting.Abstractions/IStartupFilter.cs
@@ -4,7 +4,7 @@
 using System;
 using Microsoft.AspNet.Builder;
 
-namespace Microsoft.AspNet.Hosting.Startup
+namespace Microsoft.AspNet.Hosting
 {
     public interface IStartupFilter
     {