diff --git a/src/lib.rs b/src/lib.rs
index 8e5884cab8..9d558875c7 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -79,7 +79,6 @@
 //! [rtfm]: http://www.diva-portal.org/smash/get/diva2:1005680/FULLTEXT01.pdf
 #![deny(missing_docs)]
 #![deny(warnings)]
-#![feature(proc_macro)]
 #![no_std]
 
 extern crate cortex_m;