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-rw-r--r--compiler/rustc_middle/src/error.rs2
1 files changed, 1 insertions, 1 deletions
diff --git a/compiler/rustc_middle/src/error.rs b/compiler/rustc_middle/src/error.rs
index 6d15feb888a..a4ceb494569 100644
--- a/compiler/rustc_middle/src/error.rs
+++ b/compiler/rustc_middle/src/error.rs
@@ -25,7 +25,7 @@ pub struct OpaqueHiddenTypeMismatch<'tcx> {
     pub sub: TypeMismatchReason,
 }
 
-#[derive(SessionSubdiagnostic)]
+#[derive(Subdiagnostic)]
 pub enum TypeMismatchReason {
     #[label(middle::conflict_types)]
     ConflictType {