diff --git a/lib/sinatra/dispatcher.rb b/lib/sinatra/dispatcher.rb
index f8c0e8b2..2b0ebe13 100644
--- a/lib/sinatra/dispatcher.rb
+++ b/lib/sinatra/dispatcher.rb
@@ -9,7 +9,7 @@ module Sinatra
     end
 
     def call(env)
-      Loader.reload!
+      Loader.reload! if Options.environment == :production
       
       @request = Rack::Request.new(env)