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-rw-r--r--src/libstd/hash.rs2
1 files changed, 2 insertions, 0 deletions
diff --git a/src/libstd/hash.rs b/src/libstd/hash.rs
index 2cc7e70747a..55d1411d77e 100644
--- a/src/libstd/hash.rs
+++ b/src/libstd/hash.rs
@@ -61,6 +61,8 @@
  * ```
  */
 
+#![experimental]
+
 pub use core_collections::hash::{Hash, Hasher, Writer, hash, sip};
 
 use default::Default;