diff --git a/lib/private/Setup.php b/lib/private/Setup.php
index 17fb7cbe0c2e..ce6a05697740 100644
--- a/lib/private/Setup.php
+++ b/lib/private/Setup.php
@@ -484,6 +484,7 @@ public static function updateHtaccess() {
 			$content .= "\n  RewriteRule ^core/preview.png$ index.php [PT,E=PATH_INFO:$1]";
 			$content .= "\n  RewriteCond %{REQUEST_FILENAME} !\\.(css|js|svg|gif|png|html|ttf|woff|ico|jpg|jpeg|json)$";
 			$content .= "\n  RewriteCond %{REQUEST_FILENAME} !core/img/favicon.ico$";
+			$content .= "\n  RewriteCond %{REQUEST_FILENAME} !/robots.txt";
 			$content .= "\n  RewriteCond %{REQUEST_FILENAME} !/remote.php";
 			$content .= "\n  RewriteCond %{REQUEST_FILENAME} !/public.php";
 			$content .= "\n  RewriteCond %{REQUEST_FILENAME} !/cron.php";