diff --git a/lib/inspec/rule.rb b/lib/inspec/rule.rb
index c46a1172b..426736e0b 100644
--- a/lib/inspec/rule.rb
+++ b/lib/inspec/rule.rb
@@ -6,6 +6,7 @@ require "inspec/describe"
 require "inspec/expect"
 require "inspec/resource"
 require "inspec/resources/os"
+require "inspec/input_registry"
 
 module Inspec
   class Rule