diff --git a/Data/Profunctor/Strong.idr b/Data/Profunctor/Strong.idr
index da0aba5..3e5d4a7 100644
--- a/Data/Profunctor/Strong.idr
+++ b/Data/Profunctor/Strong.idr
@@ -48,7 +48,7 @@ uncurry' = rmap (uncurry id) . first
 public export
 record GenTambara (ten, p : Type -> Type -> Type) a b where
   constructor MkTambara
-  getTambara : {0 c : Type} -> p (a `ten` c) (b `ten` c)
+  getTambara : forall c. p (a `ten` c) (b `ten` c)
 
 export
 Bifunctor ten => Profunctor p => Profunctor (GenTambara ten p) where
diff --git a/Data/Profunctor/Types.idr b/Data/Profunctor/Types.idr
index 60ae243..9bc72b4 100644
--- a/Data/Profunctor/Types.idr
+++ b/Data/Profunctor/Types.idr
@@ -22,7 +22,7 @@ interface Profunctor p where
 infix 0 :->
 public export
 0 (:->) : (p, q : k -> k' -> Type) -> Type
-p :-> q = {0 a, b : _} -> p a b -> q a b
+p :-> q = forall a, b. p a b -> q a b
 
 
 -- Instances for existing types