diff --git a/crates/hir-analysis/src/ty/def_analysis.rs b/crates/hir-analysis/src/ty/def_analysis.rs
index 4a074b42a..22323479c 100644
--- a/crates/hir-analysis/src/ty/def_analysis.rs
+++ b/crates/hir-analysis/src/ty/def_analysis.rs
@@ -889,7 +889,7 @@ enum DefKind {
     Adt(AdtDef),
     Trait(TraitDef),
     ImplTrait(Implementor),
-    Impl(HirImpl, TyId),
+    Impl(HirImpl, #[allow(dead_code)] TyId),
     Func(FuncDef),
 }