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-rw-r--r--src/liballoc/lib.rs1
1 files changed, 1 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)]