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-rw-r--r--src/libstd/lib.rs1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/libstd/lib.rs b/src/libstd/lib.rs
index bd585d39c24..939db4bb12e 100644
--- a/src/libstd/lib.rs
+++ b/src/libstd/lib.rs
@@ -299,6 +299,7 @@
 #![feature(ptr_internals)]
 #![feature(raw)]
 #![feature(raw_ref_macros)]
+#![feature(ready_macro)]
 #![feature(renamed_spin_loop)]
 #![feature(rustc_attrs)]
 #![feature(rustc_private)]