diff --git a/start.sh b/start.sh
index 9ec67f2..a4bbbdd 100755
--- a/start.sh
+++ b/start.sh
@@ -54,7 +54,7 @@ php cli/reconfigure.php ${extra_args} --base_url "https://${CLOUDRON_APP_DOMAIN}
     --disable_update
 
 echo "==> Setting permissions"
-chown -R www-data.www-data /run/php /app/data /tmp/log_api.txt
+chown -R www-data:www-data /run/php /app/data /tmp/log_api.txt
 
 echo "==> Starting apache"
 APACHE_CONFDIR="" source /etc/apache2/envvars