diff --git a/deploy/grnet-zeus/manifests/init.pp b/deploy/grnet-zeus/manifests/init.pp
index 7b7cb8826..e63589015 100644
--- a/deploy/grnet-zeus/manifests/init.pp
+++ b/deploy/grnet-zeus/manifests/init.pp
@@ -52,6 +52,7 @@
     $emailhost = 'localhost',
     $emailhostuser = false,
     $emailhostpass = false,
+    $emailport = 25,
     $debugemail = true,
     $dev = false
 ) {