diff --git a/templates/systemd-override.conf.epp b/templates/systemd-override.conf.epp
index 48b02c72f4..e451ce8c88 100644
--- a/templates/systemd-override.conf.epp
+++ b/templates/systemd-override.conf.epp
@@ -3,6 +3,9 @@
   Stdlib::Absolutepath             $datadir,
   Optional[String[1]]              $extra_systemd_config,
 | -%>
+[Unit]
+RequiresMountsFor=<%= $datadir %>
+
 [Service]
 Environment=PGPORT=<%= $port %>
 <%- if $facts['os']['family'] == 'Gentoo' { -%>