diff --git a/schala-lang/language/src/eval.rs b/schala-lang/language/src/eval.rs
index abe43b6..4c42ca4 100644
--- a/schala-lang/language/src/eval.rs
+++ b/schala-lang/language/src/eval.rs
@@ -286,6 +286,9 @@ impl<'a> State<'a> {
     let evaled_args = evaled_args?;
 
     Ok(match (builtin, evaled_args.as_slice()) {
+      (FieldAccess, &[Node::PrimObject { ref name, ref tag, ref items }]) => {
+        unimplemented!()
+      },
       (binop, &[Node::Expr(ref lhs), Node::Expr(ref rhs)]) => match (binop, lhs, rhs) {
         /* binops */
         (Add, Lit(Nat(l)), Lit(Nat(r))) => Lit(Nat(l + r)),