diff --git a/lib/turbograft.rb b/lib/turbograft.rb
index 9f5f2493..23473d27 100644
--- a/lib/turbograft.rb
+++ b/lib/turbograft.rb
@@ -35,10 +35,8 @@ def referer
       end
 
       ActiveSupport.on_load(:action_view) do
-        (ActionView::RoutingUrlFor rescue ActionView::Helpers::UrlHelper).module_eval do
-          prepend XHRUrlFor
-        end
-      end unless RUBY_VERSION =~ /^1\.8/
+        (ActionView::RoutingUrlFor rescue ActionView::Helpers::UrlHelper).prepend(XHRUrlFor)
+      end
     end
   end
 end