diff --git a/sprockets/http/app.py b/sprockets/http/app.py
index 90016a3..ac78899 100644
--- a/sprockets/http/app.py
+++ b/sprockets/http/app.py
@@ -214,6 +214,7 @@ class Application(CallbackManager, web.Application):
 
     If the `server` parameter is provided, it will be used for the server
     header. Otherwise, the server header will default as {service}/{version}
+    or {service}.
 
     """