diff --git a/lib/exception_notifier/email_notifier.rb b/lib/exception_notifier/email_notifier.rb
index 6e8c3ffc..ee1b7642 100644
--- a/lib/exception_notifier/email_notifier.rb
+++ b/lib/exception_notifier/email_notifier.rb
@@ -17,7 +17,7 @@ def method_missing(*args, &block)
 
       def self.extended(base)
         base.class_eval do
-          base.include BacktraceCleaner
+          include BacktraceCleaner
 
           # Append application view path to the ExceptionNotifier lookup context.
           self.append_view_path "#{File.dirname(__FILE__)}/views"