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-rw-r--r--src/liballoc/lib.rs2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/liballoc/lib.rs b/src/liballoc/lib.rs
index 227fcfabcf1..4e91be365e2 100644
--- a/src/liballoc/lib.rs
+++ b/src/liballoc/lib.rs
@@ -121,7 +121,7 @@
 #![feature(unsize)]
 #![feature(allocator_internals)]
 
-#![cfg_attr(not(test), feature(fused, fn_traits, placement_new_protocol))]
+#![cfg_attr(not(test), feature(fused, fn_traits, placement_new_protocol, swap_with_slice))]
 #![cfg_attr(test, feature(test, box_heap))]
 
 // Allow testing this library