diff --git a/lib/puppet/feature/augeas.rb b/lib/puppet/feature/augeas.rb
index 2e26fbf..681ba68 100644
--- a/lib/puppet/feature/augeas.rb
+++ b/lib/puppet/feature/augeas.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'puppet/util/feature'
 
 Puppet.features.add(:augeas, libs: ['augeas'])