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-rw-r--r--src/librustc/ty/mod.rs1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/librustc/ty/mod.rs b/src/librustc/ty/mod.rs
index eaaaf75f75d..56505c04f0f 100644
--- a/src/librustc/ty/mod.rs
+++ b/src/librustc/ty/mod.rs
@@ -581,6 +581,7 @@ impl<'a, 'tcx> HashStable<StableHashingContext<'a>> for ty::TyS<'tcx> {
     }
 }
 
+#[cfg_attr(not(bootstrap), rustc_diagnostic_item = "Ty")]
 pub type Ty<'tcx> = &'tcx TyS<'tcx>;
 
 impl<'tcx> rustc_serialize::UseSpecializedEncodable for Ty<'tcx> {}