diff --git a/apt/manifests/init.pp b/apt/manifests/init.pp
index f9baffb..a5b9b35 100644
--- a/apt/manifests/init.pp
+++ b/apt/manifests/init.pp
@@ -94,7 +94,7 @@ class apt::mirror {
 # === Sample usage
 #
 # apt::package { "python-igraph":
-#     ensure => present,
+#     ensure => installed,
 #     source => "http://cneurocvs.rmki.kfki.hu/packages/binary/python-igraph_0.5.2_i386.deb",
 # }
 #
@@ -105,7 +105,10 @@ define apt::package($ensure, $source) {
     $filename = regsubst($source, '.*/([^/]+)$', '\1')
 
     custom::file { "/var/cache/apt/local-archives/${filename}":
-        ensure  => $ensure,
+        ensure  => $ensure ? {
+            installed => present,
+            default   => absent,
+        },
         source  => $source,
         mode    => 0644,
         owner   => root,