1 files changed, 2 insertions, 0 deletions
diff --git a/src/rustdoc/rustdoc.rc b/src/rustdoc/rustdoc.rc
index b50defeb99d..b68efef69a5 100644
--- a/src/rustdoc/rustdoc.rc
+++ b/src/rustdoc/rustdoc.rc
@@ -11,6 +11,8 @@
 
 #[no_core];
 
+#[legacy_modes];
+
 #[allow(vecs_implicitly_copyable,
         non_implicitly_copyable_typarams)];
 #[allow(non_camel_case_types)];