diff --git a/src/TW/CodeGen/Elm.hs b/src/TW/CodeGen/Elm.hs
--- a/src/TW/CodeGen/Elm.hs
+++ b/src/TW/CodeGen/Elm.hs
@@ -197,7 +197,7 @@
                 _ -> error $ "Elm: odly shaped List value"
           | bi == tyMaybe ->
               case tvars of
-                [arg] -> "ELib.packMaybe (" <> jsonEncFor arg <> ")"
+                [arg] -> "ELib.encMaybe (" <> jsonEncFor arg <> ")"
                 _ -> error $ "Elm: odly shaped Maybe value"
           | otherwise ->
               error $ "Elm: Missing jsonEnc for built in type: " ++ show t
diff --git a/typed-wire.cabal b/typed-wire.cabal
--- a/typed-wire.cabal
+++ b/typed-wire.cabal
@@ -1,5 +1,5 @@
 name:                typed-wire
-version:             0.2.1.0
+version:             0.2.1.1
 synopsis:            WIP: Language idependent type-safe communication
 description:         Please see README.md
 homepage:            http://github.com/agrafix/typed-wire#readme