2 files changed, 3 insertions, 0 deletions
diff --git a/src/liballoc/lib.rs b/src/liballoc/lib.rs
index e25742a4a61..ec9b5eba561 100644
--- a/src/liballoc/lib.rs
+++ b/src/liballoc/lib.rs
@@ -108,6 +108,7 @@
 #![cfg_attr(stage0, feature(repr_transparent))]
 #![feature(rustc_attrs)]
 #![feature(specialization)]
+#![feature(split_ascii_whitespace)]
 #![feature(staged_api)]
 #![feature(str_internals)]
 #![feature(trusted_len)]
diff --git a/src/liballoc/str.rs b/src/liballoc/str.rs
index 32ca8d1fa5e..ec9c39c916c 100644
--- a/src/liballoc/str.rs
+++ b/src/liballoc/str.rs
@@ -78,6 +78,8 @@ pub use core::str::SplitWhitespace;
 pub use core::str::pattern;
 #[stable(feature = "encode_utf16", since = "1.8.0")]
 pub use core::str::EncodeUtf16;
+#[unstable(feature = "split_ascii_whitespace", issue = "48656")]
+pub use core::str::SplitAsciiWhitespace;
 
 #[unstable(feature = "slice_concat_ext",
            reason = "trait should not have to exist",