1 files changed, 2 insertions, 2 deletions
diff --git a/src/libsyntax/ext/tt/macro_rules.rs b/src/libsyntax/ext/tt/macro_rules.rs
index 70fc9dada42..9ebead1062e 100644
--- a/src/libsyntax/ext/tt/macro_rules.rs
+++ b/src/libsyntax/ext/tt/macro_rules.rs
@@ -73,7 +73,7 @@ impl TTMacroExpander for MacroRulesMacroExpander {
                    cx: &'cx mut ExtCtxt,
                    sp: Span,
                    input: TokenStream)
-                   -> Box<MacResult+'cx> {
+                   -> Box<dyn MacResult+'cx> {
         if !self.valid {
             return DummyResult::any(sp);
         }
@@ -99,7 +99,7 @@ fn generic_extension<'cx>(cx: &'cx mut ExtCtxt,
                           arg: TokenStream,
                           lhses: &[quoted::TokenTree],
                           rhses: &[quoted::TokenTree])
-                          -> Box<MacResult+'cx> {
+                          -> Box<dyn MacResult+'cx> {
     if cx.trace_macros() {
         trace_macros_note(cx, sp, format!("expanding `{}! {{ {} }}`", name, arg));
     }