diff --git a/plugins/Fediverse/plugin.py b/plugins/Fediverse/plugin.py
index 695c3b502..7ce6fd1ab 100644
--- a/plugins/Fediverse/plugin.py
+++ b/plugins/Fediverse/plugin.py
@@ -61,7 +61,9 @@ class FediverseHttp(httpserver.SupyHTTPServerCallback):
         if path == "/instance_actor":
             self.instance_actor(write_content)
         else:
-            assert False, repr(path)
+            self.send_response(404)
+            self.end_headers()
+            self.wfile.write(b"Error 404. There is nothing to see here.")
 
     def doWellKnown(self, handler, path):
         actor_url = ap.get_instance_actor_url()
diff --git a/src/httpserver.py b/src/httpserver.py
index 97a6f8ab8..6a717a128 100644
--- a/src/httpserver.py
+++ b/src/httpserver.py
@@ -399,6 +399,7 @@ class SupyWellKnown(SupyHTTPServerCallback):
 
         handler.send_response(404)
         self.end_headers()
+        self.wfile.write(b"Error 404. There is nothing to see here.")
 
 
 DEFAULT_CALLBACKS = {'.well-known': SupyWellKnown()}