diff --git a/src/elwig-backend b/src/elwig-backend
index 5250522..85b5580 100755
--- a/src/elwig-backend
+++ b/src/elwig-backend
@@ -95,6 +95,8 @@ class ElwigApi(BaseHTTPRequestHandler):
         self.send_header('Access-Control-Allow-Origin', '*')
         self.send_header('Access-Control-Allow-Headers', 'Authorization')
         self.send_header('Access-Control-Allow-Methods', 'HEAD, GET, OPTIONS')
+        if status_code == 401:
+            self.send_header('WWW-Authenticate', 'Basic realm=Elwig')
         if self.headers.get('Accept-Encoding') and len(data) > 64:
             accept_encoding = [e.strip() for e in self.headers.get('Accept-Encoding').split(',')]
             if 'gzip' in accept_encoding: