diff --git a/components/script/lib.rs b/components/script/lib.rs
index 2fcae084fb6..8f458557a7c 100644
--- a/components/script/lib.rs
+++ b/components/script/lib.rs
@@ -2,8 +2,6 @@
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
 
-#![feature(const_fn_fn_ptr_basics)]
-#![feature(const_fn_trait_bound)]
 #![feature(core_intrinsics)]
 #![feature(drain_filter)]
 #![feature(plugin)]