diff --git a/manifests/rule.pp b/manifests/rule.pp
index 19f97b1345bf72d825bd42786df4278baa84f770..7637bb9e275409c4fd7f1355a052e7ad491c6269 100644
--- a/manifests/rule.pp
+++ b/manifests/rule.pp
@@ -28,7 +28,7 @@
 define network::rule (
   $iprule,
   $interface = $name,
-  $family    = undef,
+  $family    = [],
   $ensure    = 'present'
 ) {
   # Validate our arrays