diff --git a/src/CwF/Structures.lagda.md b/src/CwF/Structures.lagda.md
index 96cae3b..7957226 100644
--- a/src/CwF/Structures.lagda.md
+++ b/src/CwF/Structures.lagda.md
@@ -5,7 +5,7 @@ open import CwF.Base
 module CwF.Structures where
 ```
 
-This file defines several additional structures a CwF might have, such as pi types, universes, sigma types, and identity types.
+This file defines several additional structures a CwF might have, such as pi types, universes, sigma types, and identity types. (currently only pi types)
 
 First are pi types, because a type theory without them are pretty uninteresting.
 ```