diff --git a/fhem/contrib/DEBIAN/postinst b/fhem/contrib/DEBIAN/postinst
index e992d92a7..438413a4a 100644
--- a/fhem/contrib/DEBIAN/postinst
+++ b/fhem/contrib/DEBIAN/postinst
@@ -19,7 +19,7 @@ sed -i /debian.fhem.de/d /etc/apt/sources.list
 # upstart:  not supported
 
 # detect init system
-test=$(stat /sbin/init |grep "File")
+test=$(stat /sbin/init |grep "/sbin/init")
 re="systemd$"
 
 if [[ $test =~ $re ]];
diff --git a/fhem/contrib/DEBIAN/prerm b/fhem/contrib/DEBIAN/prerm
index 896c80ef2..862bd3448 100644
--- a/fhem/contrib/DEBIAN/prerm
+++ b/fhem/contrib/DEBIAN/prerm
@@ -4,7 +4,7 @@
 set -e
 
 # detect init system
-test=$(stat /sbin/init |grep "File")
+test=$(stat /sbin/init |grep "/sbin/init")
 re="systemd$"
 
 if [[ $test =~ $re ]]; then
diff --git a/fhem/contrib/init-scripts/fhem.service b/fhem/contrib/init-scripts/fhem.service
index 375e4e76c..439880da5 100644
--- a/fhem/contrib/init-scripts/fhem.service
+++ b/fhem/contrib/init-scripts/fhem.service
@@ -13,8 +13,11 @@ WorkingDirectory=/opt/fhem
 ExecStart=/usr/bin/perl fhem.pl fhem.cfg
 #ExecStart=/usr/bin/perl fhem.pl configDB
 # uncomment next two lines if auto-restart desired
-#Restart=always
-#RestartSec=5
+
+# please select restart options according your needs
+# Restart=on-abnormal # uncomment for crash and watchdog event recovery only (keeps shutdown working)
+# Restart=always # alternativly uncomment this line for recover always
+# RestartSec=5 # uncomment always if restart required!
 
 [Install]
 WantedBy=multi-user.target