diff --git a/servant/src/Servant/API/Empty.hs b/servant/src/Servant/API/Empty.hs
index d9b80787..efc79356 100644
--- a/servant/src/Servant/API/Empty.hs
+++ b/servant/src/Servant/API/Empty.hs
@@ -9,4 +9,4 @@ import           Prelude.Compat
 -- | An empty API: one which serves nothing. Morally speaking, this should be
 -- the unit of ':<|>'. Implementors of interpretations of API types should
 -- treat 'EmptyAPI' as close to the unit as possible.
-data EmptyAPI = EmptyAPI deriving (Typeable, Eq, Show, Bounded)
+data EmptyAPI = EmptyAPI deriving (Typeable, Eq, Show, Bounded, Enum)