diff --git a/manifests/set.pp b/manifests/set.pp
index b3331c0..0c8ced0 100644
--- a/manifests/set.pp
+++ b/manifests/set.pp
@@ -88,7 +88,7 @@
     'maxelem'  => '65536',
   }
 
-  $actual_options = merge($default_options, $options)
+  $actual_options = $default_options + $options
 
   if $ensure == 'present' {
     # assert "present" target