--- a/src/cjr_env.sml	Sat Aug 09 12:50:49 2008 -0400
+++ b/src/cjr_env.sml	Sat Aug 09 16:48:32 2008 -0400
@@ -140,12 +140,13 @@
         DDatatype (_, x, n, xncs) =>
         let
             val env = pushDatatype env x n xncs
-            val dt = (TDatatype (classifyDatatype xncs, n, xncs), loc)
+            val dt = (TDatatype (classifyDatatype xncs, n, ref xncs), loc)
         in
             foldl (fn ((x', n', NONE), env) => pushENamed env x' n' dt
                     | ((x', n', SOME t), env) => pushENamed env x' n' (TFun (t, dt), loc))
             env xncs
         end
+      | DDatatypeForward (_, x, n) => pushDatatype env x n []
       | DStruct (n, xts) => pushStruct env n xts
       | DVal (x, n, t, _) => pushENamed env x n t
       | DFun (fx, n, args, ran, _) =>