diff --git a/manifests/config.pp b/manifests/config.pp
index 13b745ea..6c2f8cfb 100644
--- a/manifests/config.pp
+++ b/manifests/config.pp
@@ -24,7 +24,7 @@
   }
 
   if $email {
-    $_config = merge($config, { 'email' => $email })
+    $_config = $config + { 'email' => $email }
   } else {
     $_config = $config
   }