diff --git a/hooks/templates/rdns-zone.erb b/hooks/templates/rdns-zone.erb
index ff985d1..81a93d1 100644
--- a/hooks/templates/rdns-zone.erb
+++ b/hooks/templates/rdns-zone.erb
@@ -1,4 +1,4 @@
-@ IN SOA <%= data["zone"]["soa"] %> <%= data["zone"]["hostmaster"] %> (
+@ IN SOA <%= data["zone"]["soa"] %> <%= data["zone"]["hostmaster"] %>. (
                     <%= data["zone"]["serial"] %> ; serial
                     <%= data["zone"]["refresh"] %> ; refresh
                     <%= data["zone"]["retry"] %> ; retry