diff --git a/crates/core_simd/src/lib.rs b/crates/core_simd/src/lib.rs
index 0a16b5dacf0..7fe7d666e8d 100644
--- a/crates/core_simd/src/lib.rs
+++ b/crates/core_simd/src/lib.rs
@@ -1,7 +1,6 @@
 #![no_std]
 #![allow(incomplete_features)]
 #![feature(repr_simd, platform_intrinsics, simd_ffi, const_generics)]
-#![feature(extended_key_value_attributes)]
 #![warn(missing_docs)]
 //! Portable SIMD module.