diff --git a/lib/rack/server_pages.rb b/lib/rack/server_pages.rb
index a0cb89c..862e2d1 100644
--- a/lib/rack/server_pages.rb
+++ b/lib/rack/server_pages.rb
@@ -228,6 +228,8 @@ def render_with_layout(scope, locals = {}, &block)
       end
 
       class TiltTemplate < Template
+        require 'tilt'
+
         def find_template
           @tilt ||= Tilt[@file]
           @tilt ? self : nil