diff --git a/check_dovecot.sh b/check_dovecot.sh
index d006bfd..f251eb7 100755
--- a/check_dovecot.sh
+++ b/check_dovecot.sh
@@ -155,7 +155,7 @@ if [[ -n "$SYSTEMD_SERVICE" ]] ; then
    if [[ -f "/etc/systemd/system/$SYSTEMD_SERVICE" ]] ; then
       _systemd_service_file="/etc/systemd/system/$SYSTEMD_SERVICE"
    elif [[ -f "/lib/systemd/system/$SYSTEMD_SERVICE" ]] ; then
-      _systemd_service_file="/etc/systemd/system/$SYSTEMD_SERVICE"
+      _systemd_service_file="/lib/systemd/system/$SYSTEMD_SERVICE"
    fi
    if [[ -n "$_systemd_service_file" ]]; then
       check_string_ps="$(trim $(cat "$_systemd_service_file" | grep ExecStart | grep -o -E "ExecStart\s*=\s*[^[:space:]]+" | cut -d "=" -f2))"
diff --git a/check_postfwd.sh b/check_postfwd.sh
index 152c876..4b290f0 100755
--- a/check_postfwd.sh
+++ b/check_postfwd.sh
@@ -139,7 +139,7 @@ if [[ -n "$SYSTEMD_SERVICE" ]] ; then
    if [[ -f "/etc/systemd/system/$SYSTEMD_SERVICE" ]] ; then
       _systemd_service_file="/etc/systemd/system/$SYSTEMD_SERVICE"
    elif [[ -f "/lib/systemd/system/$SYSTEMD_SERVICE" ]] ; then
-      _systemd_service_file="/etc/systemd/system/$SYSTEMD_SERVICE"
+      _systemd_service_file="/lib/systemd/system/$SYSTEMD_SERVICE"
    fi
    if [[ -n "$_systemd_service_file" ]]; then
       check_string_ps="$(trim $(cat "$_systemd_service_file" | grep ExecStart | grep -o -E "ExecStart\s*=\s*[^[:space:]]+" | cut -d "=" -f2))"
diff --git a/check_service.sh b/check_service.sh
index 1830e3c..3825746 100755
--- a/check_service.sh
+++ b/check_service.sh
@@ -147,7 +147,7 @@ if [[ -n "$SYSTEMD_SERVICE" ]] ; then
    if [[ -f "/etc/systemd/system/$SYSTEMD_SERVICE" ]] ; then
       _systemd_service_file="/etc/systemd/system/$SYSTEMD_SERVICE"
    elif [[ -f "/lib/systemd/system/$SYSTEMD_SERVICE" ]] ; then
-      _systemd_service_file="/etc/systemd/system/$SYSTEMD_SERVICE"
+      _systemd_service_file="/lib/systemd/system/$SYSTEMD_SERVICE"
    fi
    if [[ -n "$_systemd_service_file" ]]; then
       check_string_ps="$(trim $(cat "$_systemd_service_file" | grep ExecStart | grep -o -E "ExecStart\s*=\s*[^[:space:]]+" | cut -d "=" -f2))"