diff --git a/podman-ntfy/05_freshinstall.sh b/podman-ntfy/05_freshinstall.sh
index db21d26..3e4145e 100755
--- a/podman-ntfy/05_freshinstall.sh
+++ b/podman-ntfy/05_freshinstall.sh
@@ -7,6 +7,8 @@ source ${ABSDIR}/vars.sh
 ensure_pwd_is_scriptdir
 ensure_not_root
 
+ensure_variables_are_defined "$envvars"
+
 if podman volume exists ${ntfy_data_volume}; then
 	echo "Files or volumes from previous installation already exists"
 	echo "Please remove them before fresh install, or try continue with normal installation"