diff --git a/examples/hex.rs b/examples/hex.rs
index 621f55bc09..21827b375a 100644
--- a/examples/hex.rs
+++ b/examples/hex.rs
@@ -13,7 +13,6 @@
 //! and you should see `746573740a` get printed out.
 
 #![allow(internal_features)]
-#![feature(wasm_target_feature)]
 #![cfg_attr(test, feature(test))]
 #![cfg_attr(
     any(target_arch = "x86", target_arch = "x86_64"),