1 files changed, 2 insertions, 0 deletions
diff --git a/src/libsyntax/ast.rs b/src/libsyntax/ast.rs
index 941078b158b..b8e08dab722 100644
--- a/src/libsyntax/ast.rs
+++ b/src/libsyntax/ast.rs
@@ -784,6 +784,8 @@ pub enum Ty_ {
     TyUnboxedFn(Gc<UnboxedFnTy>),
     TyTup(Vec<P<Ty>> ),
     TyPath(Path, Option<OwnedSlice<TyParamBound>>, NodeId), // for #7264; see above
+    // No-op; kept solely so that we can pretty-print faithfully
+    TyParen(P<Ty>),
     TyTypeof(Gc<Expr>),
     // TyInfer means the type should be inferred instead of it having been
     // specified. This can appear anywhere in a type.