diff --git a/lib/sinatra/base.rb b/lib/sinatra/base.rb
index d20e7b46..e060882f 100644
--- a/lib/sinatra/base.rb
+++ b/lib/sinatra/base.rb
@@ -9,7 +9,7 @@ require 'time'
 require 'uri'
 
 # other files we need
-require 'sinatra/showexceptions'
+require 'sinatra/show_exceptions'
 require 'sinatra/version'
 
 module Sinatra
diff --git a/lib/sinatra/showexceptions.rb b/lib/sinatra/show_exceptions.rb
similarity index 100%
rename from lib/sinatra/showexceptions.rb
rename to lib/sinatra/show_exceptions.rb