diff --git a/Rakefile b/Rakefile
index 01c85eb99..416807dad 100644
--- a/Rakefile
+++ b/Rakefile
@@ -1,7 +1,7 @@
 require 'puppetlabs_spec_helper/rake_tasks'
 require 'puppet-lint/tasks/puppet-lint'
 
-PuppetLint.configuration.fail_on_warnings
+PuppetLint.configuration.fail_on_warnings = true
 PuppetLint.configuration.send('relative')
 PuppetLint.configuration.send('disable_80chars')
 PuppetLint.configuration.send('disable_class_inherits_from_params_class')