diff --git a/README b/README
index 1999ce8..a990b4e 100644
--- a/README
+++ b/README
@@ -9,8 +9,16 @@ Classes:
 Definitions:
   * apt::conf
 
-
 apt::conf{"99unattended-upgrade":
   ensure  => present,
   content => "APT::Periodic::Unattended-Upgrade \"1\";\n",
 }
+
+  * apt::key
+
+apt::key {"blah-key":
+  source  => "http://dev.camptocamp.com/packages/debian/pub.key",
+  keyid   => "A37E4CF5",
+  before  => Exec["apt-get_update"],
+}
+
diff --git a/manifests/definitions/key.pp b/manifests/definitions/key.pp
new file mode 100644
index 0000000..b72d490
--- /dev/null
+++ b/manifests/definitions/key.pp
@@ -0,0 +1,16 @@
+define apt::key($ensure = present, $source, $keyid) {
+  case $ensure {
+    present: {
+      exec { "/usr/bin/wget -O - '$source' | /usr/bin/apt-key add -":
+        unless => "apt-key list | grep -Fqe '$keyid'",
+        path   => "/bin:/usr/bin",
+        before => Exec["apt-get_update"],
+        notify => Exec["apt-get_update"],
+      }
+    }
+    
+    absent: {
+      notice "Sorry, not yet implemented"
+    }
+  }
+}