diff --git a/nginx.tmpl b/nginx.tmpl
index 07e2b50..308f6c8 100644
--- a/nginx.tmpl
+++ b/nginx.tmpl
@@ -105,9 +105,13 @@ map $scheme $proxy_x_forwarded_ssl {
 
 gzip_types text/plain text/css application/javascript application/json application/x-javascript text/xml application/xml application/xml+rss text/javascript;
 
+{{ if $.Env.CUSTOM_LOG_FORMAT }}
+log_format vhost '{{ $.Env.CUSTOM_LOG_FORMAT }}';
+{{ else }}
 log_format vhost '$host $remote_addr - $remote_user [$time_local] '
                  '"$request" $status $body_bytes_sent '
                  '"$http_referer" "$http_user_agent"';
+{{ end }}
 
 access_log off;