diff --git a/python/manifests/init.pp b/python/manifests/init.pp
index db35d90..6191c63 100644
--- a/python/manifests/init.pp
+++ b/python/manifests/init.pp
@@ -39,7 +39,7 @@ class python {
 #   source => "puppet:///files/packages/moin-1.8.8.tar.gz",
 # }
 #
-define python::setup::install($python="python", source="") {
+define python::setup::install($python="python", $source="") {
 
     if $source {
         $filename = basename($source)