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-rw-r--r--src/libstd/lib.rs1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/libstd/lib.rs b/src/libstd/lib.rs
index 82bc1314ad5..784f5eecf0b 100644
--- a/src/libstd/lib.rs
+++ b/src/libstd/lib.rs
@@ -234,6 +234,7 @@
 #![feature(no_std)]
 #![feature(oom)]
 #![feature(optin_builtin_traits)]
+#![feature(placement_in_syntax)]
 #![feature(rand)]
 #![feature(raw)]
 #![feature(reflect_marker)]