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diff --git a/src/libstd/num/isize.rs b/src/libstd/num/isize.rs
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+++ b/src/libstd/num/isize.rs
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+// Copyright 2012-2015 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+//! Operations and constants for pointer-sized signed integers (`isize` type)
+//!
+//! This type was recently added to replace `int`. The rollout of the
+//! new type will gradually take place over the alpha cycle along with
+//! the development of clearer conventions around integer types.
+
+#![stable]
+#![doc(primitive = "isize")]
+
+pub use core::isize::{BITS, BYTES, MIN, MAX};
+
+int_module! { isize }