diff --git a/manifests/init.pp b/manifests/init.pp
index 55d5fe9..9e8a711 100644
--- a/manifests/init.pp
+++ b/manifests/init.pp
@@ -28,7 +28,7 @@
     jump   => 'DNAT',
     proto  => 'tcp',
     dport  => 5432,
-    todest => "$postgres_ip}:5432",
+    todest => "${postgres_ip}:5432",
     table  => 'nat',
   }