diff --git a/README.md b/README.md
index c879cbb..f9f0145 100644
--- a/README.md
+++ b/README.md
@@ -69,8 +69,8 @@ node 'server.example.com' {
     path              => "$smb_share",
     browsable         => true,
     writable          => true,
-    create_mask       => 0770,
-    directory_mask    => 0770,
+    create_mask       => '0770',
+    directory_mask    => '0770',
   }
 
   class { 'samba::server::ads':