diff --git a/scripts/deploy_webserver.sh b/scripts/deploy_webserver.sh
index 19827c5..b796322 100755
--- a/scripts/deploy_webserver.sh
+++ b/scripts/deploy_webserver.sh
@@ -10,7 +10,7 @@ firewall-cmd --zone=public --add-service=https --permanent
 firewall-cmd --reload
 
 # Request SSL certificate. This assumes DNS has been set up already
-if [ -n $NOSSL ] || [ $NOSSL -ne 1 ]; then
+if [ x"$NOSSL" = "x" ] || [ $NOSSL -ne 1 ]; then
   certbot -n --nginx -d ${DOMAINNAME} -d www.${DOMAINNAME} --agree-tos -m "${letsencryptemail}"
 fi