diff --git a/lib/puppet/functions/sudo/defaults.rb b/lib/puppet/functions/sudo/defaults.rb
index c5bc8cfb..a0866dc2 100644
--- a/lib/puppet/functions/sudo/defaults.rb
+++ b/lib/puppet/functions/sudo/defaults.rb
@@ -41,11 +41,11 @@ def defaults(*args)
   end
 
   def defaults_entry(key, config)
-    entry = "Defaults\t#{key}"
+    entry = "Defaults"
+    entry.concat((config['list']).to_s) if config && config.key?('list')
+    entry << "\t#{key}"
 
     unless config.nil? || config.equal?(:undef)
-      entry.concat((config['list']).to_s) if config.key? 'list'
-
       operator = '='
       operator = config['operator'] if config.key? 'operator'