diff --git a/plugins/puppet/parser/functions/strlength.rb b/plugins/puppet/parser/functions/strlength.rb
index 3b99ed0..8f93e4e 100644
--- a/plugins/puppet/parser/functions/strlength.rb
+++ b/plugins/puppet/parser/functions/strlength.rb
@@ -1,6 +1,6 @@
 module Puppet::Parser::Functions
     newfunction(:strlength, :type => :rvalue) do |args|
-       argv[0].to_s.length 
+       args[0].to_s.length 
     end
 end