1 files changed, 3 insertions, 1 deletions
diff --git a/src/libsyntax/fold.rs b/src/libsyntax/fold.rs
index 72be633d456..04b289b9fca 100644
--- a/src/libsyntax/fold.rs
+++ b/src/libsyntax/fold.rs
@@ -447,6 +447,7 @@ pub fn fold_ty_param<T: Folder>(tp: &TyParam, fld: &mut T) -> TyParam {
     TyParam {
         ident: tp.ident,
         id: id,
+        sized: tp.sized,
         bounds: tp.bounds.map(|x| fold_ty_param_bound(x, fld)),
         default: tp.default.map(|x| fld.fold_ty(x)),
         span: tp.span
@@ -620,7 +621,7 @@ pub fn noop_fold_item_underscore<T: Folder>(i: &Item_, folder: &mut T) -> Item_
                      methods.iter().map(|x| folder.fold_method(*x)).collect()
             )
         }
-        ItemTrait(ref generics, ref traits, ref methods) => {
+        ItemTrait(ref generics, ref sized, ref traits, ref methods) => {
             let methods = methods.iter().map(|method| {
                 match *method {
                     Required(ref m) => Required(folder.fold_type_method(m)),
@@ -628,6 +629,7 @@ pub fn noop_fold_item_underscore<T: Folder>(i: &Item_, folder: &mut T) -> Item_
                 }
             }).collect();
             ItemTrait(fold_generics(generics, folder),
+                      *sized,
                       traits.iter().map(|p| fold_trait_ref(p, folder)).collect(),
                       methods)
         }