1 files changed, 1 insertions, 1 deletions
diff --git a/lib/API.hs b/lib/API.hs
index 4c80535..32465c7 100644
--- a/lib/API.hs
+++ b/lib/API.hs
@@ -56,7 +56,7 @@ type API = "stations" :> Get '[JSON] (Map StationID Station)
   -- TODO: perhaps require a first ping for registration?
   :<|> "train" :> "register" :> Capture "Trip ID" TripID :> ReqBody '[JSON] RegisterJson :> Post '[JSON] Token
   -- TODO: perhaps a websocket instead?
-  :<|> "train" :> "ping" :> ReqBody '[JSON] TrainPing :> Post '[JSON] NoContent
+  :<|> "train" :> "ping" :> ReqBody '[JSON] TrainPing :> Post '[JSON] (Maybe TrainAnchor)
   :<|> "train" :> "ping" :> "ws" :> WebSocket
   -- debug things
   :<|> "debug" :> "pings" :> Get '[JSON] (Map Token [TrainPing])