diff --git a/src/Servant/Server/Internal.hs b/src/Servant/Server/Internal.hs
index a8e97687..07da7df5 100644
--- a/src/Servant/Server/Internal.hs
+++ b/src/Servant/Server/Internal.hs
@@ -163,9 +163,6 @@ class HasServer layout where
   type Server' layout :: *
   route :: Proxy layout -> Server' layout -> RoutingApplication
 
-canonicalize :: Canonicalize layout ~ t => Proxy layout -> Proxy t
-canonicalize Proxy = Proxy
-
 -- * Instances
 
 -- | A server for @a ':<|>' b@ first tries to match the request against the route