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-rw-r--r--src/libstd/prelude.rs2
1 files changed, 2 insertions, 0 deletions
diff --git a/src/libstd/prelude.rs b/src/libstd/prelude.rs
index dfe6988624e..61e8b63af35 100644
--- a/src/libstd/prelude.rs
+++ b/src/libstd/prelude.rs
@@ -37,6 +37,8 @@
 //! particularly useful standalone functions, like `from_str`, `range`, and
 //! `drop`, `spawn`, and `channel`.
 
+#![experimental]
+
 // Reexported core operators
 #[doc(no_inline)] pub use kinds::{Copy, Send, Sized, Share};
 #[doc(no_inline)] pub use ops::{Add, Sub, Mul, Div, Rem, Neg, Not};