diff --git a/etc/icinga2/zones.d/README b/etc/icinga2/zones.d/README
new file mode 100644
index 000000000..ceff6bd8c
--- /dev/null
+++ b/etc/icinga2/zones.d/README
@@ -0,0 +1,2 @@
+This directory contains configuration files for cluster zones. If you're not
+running a cluster you can safely ignore this directory.