Get the generic controller type in controllerfactory

Question

I have registered a new route like this

        context.MapRoute(
            "Dashboard_default",
            "Dashboard",
            new { action = "Index", controller = "Dashboard`1" },
            new[] { "SomeNamespace.Controllers" }
        );

This route makes my CreateController method in my StructureMapControllerFactory to fail when trying to get the controller type, code below

        try
        {
            var controllerType = base.GetControllerType(requestContext, controllerName);
            if(controllerType.IsGenericType) {
              // Some logic here     
            }
            return ObjectFactory.GetInstance(controllerType) as IController;
        }
        catch (Exception)
        {
            return base.CreateController(requestContext, controllerName);
        }

Has I done something wrong or does the default implementation of GetControllerType not support generic types? If so any suggestions on how to solve this?