diff --git a/src/Umbraco.Web/UmbracoModule.cs b/src/Umbraco.Web/UmbracoModule.cs
index da3ed2f1da..a8edfe16a3 100644
--- a/src/Umbraco.Web/UmbracoModule.cs
+++ b/src/Umbraco.Web/UmbracoModule.cs
@@ -431,9 +431,16 @@ namespace Umbraco.Web
 		    app.PreSendRequestHeaders += (sender, args) =>
 		        {
                     var httpContext = ((HttpApplication)sender).Context;
-                    httpContext.Response.Headers.Remove("Server");
-                    //this doesn't normally work since IIS sets it but we'll keep it here anyways.
-                    httpContext.Response.Headers.Remove("X-Powered-By");
+					try
+					{
+						httpContext.Response.Headers.Remove("Server");
+						//this doesn't normally work since IIS sets it but we'll keep it here anyways.
+						httpContext.Response.Headers.Remove("X-Powered-By");
+					}
+					catch (PlatformNotSupportedException ex)
+					{
+						// can't remove headers this way on IIS6 or cassini.
+					}
 		        };
 		}