diff --git a/files/__main__.py b/files/__main__.py
index 7b7dbe242f..3f0a61e254 100644
--- a/files/__main__.py
+++ b/files/__main__.py
@@ -86,7 +86,7 @@ mail = Mail(app)
 def before_request():
 
 	g.agent = request.headers.get("User-Agent")
-	if not g.agent: abort(403)
+	if not g.agent: return 'Please use a "User-Agent" header!', 403
 
 	ua = g.agent.lower()