diff --git a/setup/systemd/notifyLastSessions.timer b/setup/systemd/notifyLastSessions.timer
index 7a65578..4fcf0ab 100644
--- a/setup/systemd/notifyLastSessions.timer
+++ b/setup/systemd/notifyLastSessions.timer
@@ -1,7 +1,9 @@
 [Unit]
 Description=Run CDRTool notifyLastSession each day
 
 [Timer]
 OnCalendar=*-*-* 02:15:00
 RandomizedDelaySec=900
 
+[Install]
+WantedBy=timers.target
diff --git a/setup/systemd/purgeSIPTrace.timer b/setup/systemd/purgeSIPTrace.timer
index ddd6a2b..1526d72 100644
--- a/setup/systemd/purgeSIPTrace.timer
+++ b/setup/systemd/purgeSIPTrace.timer
@@ -1,6 +1,9 @@
 [Unit]
 Description=Run CDRTool purge SIP Trace each day
 
 [Timer]
 OnCalendar=*-*-* 03:20:00
 RandomizedDelaySec=900
+
+[Install]
+WantedBy=timers.target
diff --git a/setup/systemd/purgeTables.timer b/setup/systemd/purgeTables.timer
index 65b44a0..0c77ba0 100644
--- a/setup/systemd/purgeTables.timer
+++ b/setup/systemd/purgeTables.timer
@@ -1,6 +1,9 @@
 [Unit]
 Description=Run CDRTool purgeTables each day
 
 [Timer]
 OnCalendar=*-*-* 04:00:00
 RandomizedDelaySec=900
+
+[Install]
+WantedBy=timers.target
diff --git a/setup/systemd/rotateTables.timer b/setup/systemd/rotateTables.timer
index 01465a4..f466bd8 100644
--- a/setup/systemd/rotateTables.timer
+++ b/setup/systemd/rotateTables.timer
@@ -1,6 +1,9 @@
 [Unit]
 Description=Run CDRTool rotate Tables each month
 
 [Timer]
 OnCalendar=*-*-1 03:00:00
-RandomizedDelaySec=900
\ No newline at end of file
+RandomizedDelaySec=900
+
+[Install]
+WantedBy=timers.target