diff --git a/network/manifests/init.pp b/network/manifests/init.pp
index 61fcaf8..cdce314 100644
--- a/network/manifests/init.pp
+++ b/network/manifests/init.pp
@@ -283,7 +283,7 @@ define network::route($gateway = "", $device, $ipv6gateway = "") {
             }
         }
         default: {
-            if ipv6gateway != "" {
+            if $ipv6gateway != "" {
                 fail("Custom IPv6 routes not supported yet.")
             }
             case $operatingsystem {