diff --git a/mod_php-5.3_debian-9_install.sh b/mod_php-5.3_debian-9_install.sh
index 5729bb0..9810133 100755
--- a/mod_php-5.3_debian-9_install.sh
+++ b/mod_php-5.3_debian-9_install.sh
@@ -124,12 +124,15 @@ detect_os_1 () {
 
 # - Support systemd ?
 # -
-if [[ "X$(which systemd)" = "X" ]]; then
-   SYSTEMD_EXISTS=false
-else
+systemd=$(which systemd)
+systemctl=$(which systemctl)
+if [[ -n "$systemd" ]] || [[ -n "$systemctl" ]] ; then
    SYSTEMD_EXISTS=true
+else
+   SYSTEMD_EXISTS=false
 fi
 
+
 # - Set variable
 # -    os_dist
 # -    os_version
diff --git a/mod_php-5.4_debian-9_install.sh b/mod_php-5.4_debian-9_install.sh
index 7927d03..6fdd1e8 100755
--- a/mod_php-5.4_debian-9_install.sh
+++ b/mod_php-5.4_debian-9_install.sh
@@ -124,10 +124,12 @@ detect_os_1 () {
 
 # - Support systemd ?
 # -
-if [[ "X$(which systemd)" = "X" ]]; then
-   SYSTEMD_EXISTS=false
-else
+systemd=$(which systemd)
+systemctl=$(which systemctl)
+if [[ -n "$systemd" ]] || [[ -n "$systemctl" ]] ; then
    SYSTEMD_EXISTS=true
+else
+   SYSTEMD_EXISTS=false
 fi
 
 # - Set variable