diff -up chrony-3.5/examples/chronyd.service.service-helper chrony-3.5/examples/chronyd.service
--- chrony-3.5/examples/chronyd.service.service-helper	2019-05-10 12:22:57.000000000 +0200
+++ chrony-3.5/examples/chronyd.service	2019-05-14 13:42:38.069516800 +0200
@@ -10,6 +10,7 @@ Type=forking
 PIDFile=/run/chrony/chronyd.pid
 EnvironmentFile=-/etc/sysconfig/chronyd
 ExecStart=/usr/sbin/chronyd $OPTIONS
+ExecStartPost=/usr/libexec/chrony-helper update-daemon
 PrivateTmp=yes
 ProtectHome=yes
 ProtectSystem=full