diff --git a/hydra/berlin.scm b/hydra/berlin.scm
index c1e4894..e0044c1 100644
--- a/hydra/berlin.scm
+++ b/hydra/berlin.scm
@@ -316,7 +316,7 @@ Happy hacking!\n"))
              ;; For the Zabbix database.  It was created by manually
              ;; following the instructions here:
              ;; https://www.zabbix.com/documentation/3.0/manual/appendix/install/db_scripts
-             (postgresql-service)
+             (service postgresql-service-type)
 
              (service ntp-service-type)