diff --git a/additional-feature-ts.md b/additional-feature-ts.md
index bda31e3..5308b3f 100644
--- a/additional-feature-ts.md
+++ b/additional-feature-ts.md
@@ -241,7 +241,7 @@ value
 |> f
 |> {
   try |> JSON.parse;
-  catch |> { message: #.message };
+  catch |> ({ message: #.message });
 }
 |> g(#, 1);
 ```
@@ -496,4 +496,4 @@ g (_1, 1);
 [WHATWG-stream piping]: https://streams.spec.whatwg.org/#pipe-chains
 [Wikipedia: term rewriting]: https://en.wikipedia.org/wiki/Term_rewriting
 [zero runtime cost]: ./goals.md#zero-runtime-cost
-        
\ No newline at end of file
+