1 files changed, 2 insertions, 0 deletions
diff --git a/src/libcore/ptr.rs b/src/libcore/ptr.rs
index 1cbea057e88..c05dffb3696 100644
--- a/src/libcore/ptr.rs
+++ b/src/libcore/ptr.rs
@@ -52,6 +52,7 @@
 //! the raw pointer. It doesn't destroy `T` or deallocate any memory.
 //!
 //! ```
+//! # #![feature(alloc)]
 //! use std::boxed;
 //!
 //! unsafe {
@@ -70,6 +71,7 @@
 //! ## 3. Get it from C.
 //!
 //! ```
+//! # #![feature(libc)]
 //! extern crate libc;
 //!
 //! use std::mem;