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-rw-r--r--src/libstd_unicode/lib.rs1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/libstd_unicode/lib.rs b/src/libstd_unicode/lib.rs
index 8cdeb6c8ad1..29de017c64d 100644
--- a/src/libstd_unicode/lib.rs
+++ b/src/libstd_unicode/lib.rs
@@ -31,5 +31,6 @@
 
 #![feature(unicode)]
 #![feature(staged_api)]
+#![rustc_deprecated(since = "1.27.0", reason = "moved into libcore")]
 
 pub use core::unicode::*;