1 files changed, 9 insertions, 1 deletions
diff --git a/compiler/rustc_middle/src/error.rs b/compiler/rustc_middle/src/error.rs
index dc4aa18640f..046186d274c 100644
--- a/compiler/rustc_middle/src/error.rs
+++ b/compiler/rustc_middle/src/error.rs
@@ -1,5 +1,5 @@
 use rustc_macros::Diagnostic;
-use rustc_span::Span;
+use rustc_span::{Span, Symbol};
 
 use crate::ty::Ty;
 
@@ -74,6 +74,14 @@ pub(crate) struct StrictCoherenceNeedsNegativeCoherence {
 }
 
 #[derive(Diagnostic)]
+#[diag(middle_requires_lang_item)]
+pub(crate) struct RequiresLangItem {
+    #[primary_span]
+    pub span: Option<Span>,
+    pub name: Symbol,
+}
+
+#[derive(Diagnostic)]
 #[diag(middle_const_not_used_in_type_alias)]
 pub(super) struct ConstNotUsedTraitAlias {
     pub ct: String,