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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 f7748aa3f04..f95fc8a1b1a 100644
--- a/src/libstd/lib.rs
+++ b/src/libstd/lib.rs
@@ -243,6 +243,7 @@
 #![feature(allocator_api)]
 #![feature(alloc_system)]
 #![feature(allocator_internals)]
+#![feature(allow_internal_unsafe)]
 #![feature(allow_internal_unstable)]
 #![feature(asm)]
 #![feature(box_syntax)]