diff --git a/compiler/rustc_hir/src/errors.rs b/compiler/rustc_hir/src/errors.rs
index 7ed09d3f293..e593ed1044a 100644
--- a/compiler/rustc_hir/src/errors.rs
+++ b/compiler/rustc_hir/src/errors.rs
@@ -1,5 +1,6 @@
 use crate::LangItem;
 
+#[derive(Debug, Copy, Clone, PartialEq, Eq, Hash, Encodable, Decodable)]
 pub struct LangItemError(pub LangItem);
 
 impl ToString for LangItemError {