diff --git a/nginx/start.sh b/nginx/start.sh
index 2cb65f1a..a0f7718b 100755
--- a/nginx/start.sh
+++ b/nginx/start.sh
@@ -1,11 +1,10 @@
 #!/bin/sh
 
-if [[ -z ENABLE_CERTBOT || -f /certs/cert.pem ]]
+if [ -z ENABLE_CERTBOT ] || [ -f /certs/cert.pem ]
 then
   cp /etc/nginx/nginx.conf.default /etc/nginx/nginx.conf
 else
-  openssl req -newkey rsa:2048 -x509 -keyout /tmp/snakeoil.pem -out /tmp/snakeoil.pem -days 365 -nodes -subj "/C=NA/ST=None/
-L=None/O=None/CN=$DOMAIN"
+  openssl req -newkey rsa:2048 -x509 -keyout /tmp/snakeoil.pem -out /tmp/snakeoil.pem -days 365 -nodes -subj "/C=NA/ST=None/L=None/O=None/CN=$DOMAIN"
   cp /etc/nginx/nginx.conf.fallback /etc/nginx/nginx.conf
 fi