diff --git a/spec/support/super_style_old_formatter_example.rb b/spec/support/super_style_old_formatter_example.rb
index af024f9c03..6e5980ed47 100644
--- a/spec/support/super_style_old_formatter_example.rb
+++ b/spec/support/super_style_old_formatter_example.rb
@@ -1,3 +1,5 @@
+require 'rspec/core/formatters/base_text_formatter'
+
 class SuperStyleOldFormatterExample < RSpec::Core::Formatters::BaseTextFormatter
 
   def initialize(output)