diff --git a/root/migrations/02-default-location b/root/migrations/02-default-location
index 57db997..7d35cb6 100644
--- a/root/migrations/02-default-location
+++ b/root/migrations/02-default-location
@@ -5,7 +5,7 @@ DEFAULT_CONF="/config/nginx/site-confs/default.conf"
 OLD_ROOT="root /usr/share/webapps/freshrss/p;"
 NEW_ROOT="root /app/www/p;"
 
-if grep -q "${OLD_ROOT}" "${DEFAULT_CONF}"; then
+if [[ -f "${DEFAULT_CONF}" ]] && grep -q "${OLD_ROOT}" "${DEFAULT_CONF}" 2>/dev/null; then
     echo "updating root in ${DEFAULT_CONF}"
     sed -i "s|${OLD_ROOT}|${NEW_ROOT}|" "${DEFAULT_CONF}"
 fi