diff --git a/daemon.py b/daemon.py
index 408834fe..f11f81e5 100644
--- a/daemon.py
+++ b/daemon.py
@@ -378,6 +378,7 @@ class PubServer(BaseHTTPRequestHandler):
         self.send_header('InstanceID', self.server.instanceId)
         self.send_header('X-Robots-Tag','noindex')
         self.send_header('cache-control','public, max-age=315576000, immutable')
+        self.send_header('x-cached','HIT')
         self.send_header('x-clacks-overhead','GNU Natalie Nguyen')
         self.send_header('access-control-allow-origin','*')
         self.send_header('accept-ranges','bytes')