diff --git a/descriptive.cabal b/descriptive.cabal
--- a/descriptive.cabal
+++ b/descriptive.cabal
@@ -1,5 +1,5 @@
 name:                descriptive
-version:             0.4.0
+version:             0.4.1
 synopsis:            Self-describing consumers/parsers; forms, cmd-line args, JSON, etc.
 description:         Self-describing consumers/parsers. See the README.md for more information. It is currently EXPERIMENTAL.
 stability:           Experimental
diff --git a/src/Descriptive/JSON.hs b/src/Descriptive/JSON.hs
--- a/src/Descriptive/JSON.hs
+++ b/src/Descriptive/JSON.hs
@@ -113,7 +113,9 @@
   where doc = Key k
 
 -- | Consume an array.
-array :: Text -> Consumer Value Doc a -> Consumer Value Doc (Vector a)
+array :: Text -- ^ Description of this array.
+      -> Consumer Value Doc a -- ^ Consumer for each element in the array.
+      -> Consumer Value Doc (Vector a)
 array desc =
   wrap (\v d -> (Wrap doc (fst (d Aeson.Null)),v))
        (\v _ p ->