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-rw-r--r--src/libstd/lib.rs2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/libstd/lib.rs b/src/libstd/lib.rs
index 60ad330bb9b..b0069f826ee 100644
--- a/src/libstd/lib.rs
+++ b/src/libstd/lib.rs
@@ -302,7 +302,7 @@
 #![feature(unboxed_closures)]
 #![feature(untagged_unions)]
 #![feature(unwind_attributes)]
-#![feature(use_extern_macros)]
+#![cfg_attr(stage0, feature(use_extern_macros))]
 #![feature(doc_cfg)]
 #![feature(doc_masked)]
 #![feature(doc_spotlight)]