diff --git a/third_party/rust/encoding_rs/src/x_user_defined.rs b/third_party/rust/encoding_rs/src/x_user_defined.rs
--- a/third_party/rust/encoding_rs/src/x_user_defined.rs
+++ b/third_party/rust/encoding_rs/src/x_user_defined.rs
@@ -16,6 +16,7 @@ cfg_if! {
         use simd_funcs::*;
         use core::simd::u16x8;
         use core::simd::cmp::SimdPartialOrd;
+        use core::simd::Select;
 
         #[inline(always)]
         fn shift_upper(unpacked: u16x8) -> u16x8 {