diff --git a/third_party/rust/encoding_rs/src/x_user_defined.rs b/third_party/rust/encoding_rs/src/x_user_defined.rs
index 7af7d5e..afd93c1 100644
--- a/third_party/rust/encoding_rs/src/x_user_defined.rs
+++ b/third_party/rust/encoding_rs/src/x_user_defined.rs
@@ -7,6 +7,7 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
+use core::simd::Select;
 use super::*;
 use crate::handles::*;
 use crate::variant::*;