diff --git a/contrib/systemd/btrbk.service.in b/contrib/systemd/btrbk.service.in
index 0f36f41..d3fdf8f 100644
--- a/contrib/systemd/btrbk.service.in
+++ b/contrib/systemd/btrbk.service.in
@@ -1,6 +1,8 @@
 [Unit]
 Description=btrbk backup
 Documentation=man:btrbk(1)
+ConditionPathExists=|@CONFDIR@/btrbk/btrbk.conf
+ConditionPathExists=|@CONFDIR@/btrbk.conf
 
 [Service]
 Type=oneshot
diff --git a/contrib/systemd/btrbk.timer.in b/contrib/systemd/btrbk.timer.in
index eda9604..96760ee 100644
--- a/contrib/systemd/btrbk.timer.in
+++ b/contrib/systemd/btrbk.timer.in
@@ -1,9 +1,10 @@
 [Unit]
 Description=btrbk daily backup
+ConditionPathExists=|@CONFDIR@/btrbk/btrbk.conf
+ConditionPathExists=|@CONFDIR@/btrbk.conf
 
 [Timer]
-OnCalendar=daily
-AccuracySec=10min
+OnCalendar=hourly
 Persistent=true
 
 [Install]