diff --git a/check_cert_for_prosody.sh b/check_cert_for_prosody.sh
index 90956f5..d88209e 100755
--- a/check_cert_for_prosody.sh
+++ b/check_cert_for_prosody.sh
@@ -166,6 +166,11 @@ fi
 [[ -z "$key_installed" ]] && key_installed="/etc/prosody/certs/${service_domain}.key"
 [[ -z "$key_newest" ]] && key_newest="/var/lib/dehydrated/certs/${service_domain}/privkey.pem"
 
+[[ -z "$service_name" ]] && service_name="Prosody"
+[[ -z "$check_string_ps" ]] && check_string_ps="[[:digit:]]\ lua[[:digit:]].[[:digit:]] /usr/bin/prosody"
+[[ -z "$service_user" ]] && service_user="prosody"
+[[ -z "$service_group" ]] && service_group="prosody"
+
 # - Systemd supported ?
 # -
 systemd_supported=false