diff --git a/examples/intrinsics.rs b/examples/intrinsics.rs
index c165fcc..7f502bb 100644
--- a/examples/intrinsics.rs
+++ b/examples/intrinsics.rs
@@ -6,10 +6,8 @@
 #![allow(unused_features)]
 #![cfg_attr(thumb, no_main)]
 #![deny(dead_code)]
-#![feature(alloc_system)]
 #![feature(asm)]
 #![feature(compiler_builtins_lib)]
-#![feature(core_float)]
 #![feature(lang_items)]
 #![feature(start)]
 #![feature(allocator_api)]