diff --git a/tasks/main.yml b/tasks/main.yml
index 9729187e3129101f8eadc3761ed855d41ef19e2c..11d98561884a4539610f12d3726cb76a19b8a213 100644
--- a/tasks/main.yml
+++ b/tasks/main.yml
@@ -43,6 +43,7 @@
     owner: root
     group: root
     mode: 0644
+  when: postfix__transport_map
   notify: ['make postfix transport.db']
 ...
 # vi: set ts=2 sts=2 sw=2 et ft=yaml: