diff --git a/src/librustc_target/lib.rs b/src/librustc_target/lib.rs
index a9db0254a7d..71150e74f70 100644
--- a/src/librustc_target/lib.rs
+++ b/src/librustc_target/lib.rs
@@ -8,7 +8,6 @@
 //! LLVM.
 
 #![doc(html_root_url = "https://doc.rust-lang.org/nightly/")]
-#![feature(box_syntax)]
 #![feature(bool_to_option)]
 #![feature(nll)]