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-rw-r--r--src/libstd/std.rc2
1 files changed, 2 insertions, 0 deletions
diff --git a/src/libstd/std.rc b/src/libstd/std.rc
index c43faa1fd6c..9b4d937a533 100644
--- a/src/libstd/std.rc
+++ b/src/libstd/std.rc
@@ -10,6 +10,8 @@
 
 #[no_core];
 
+#[legacy_modes];
+
 #[allow(vecs_implicitly_copyable)];
 #[deny(non_camel_case_types)];