diff --git a/compiler/rustc_hir_analysis/src/check/compare_impl_item.rs b/compiler/rustc_hir_analysis/src/check/compare_impl_item.rs
index 7332888c5f91..8262a79d2e55 100644
--- a/compiler/rustc_hir_analysis/src/check/compare_impl_item.rs
+++ b/compiler/rustc_hir_analysis/src/check/compare_impl_item.rs
@@ -424,12 +424,12 @@ fn compare_method_predicate_entailment<'tcx>(
     Ok(())
 }
 
-struct RemapLateParam<'a, 'tcx> {
+struct RemapLateParam<'tcx> {
     tcx: TyCtxt<'tcx>,
-    mapping: &'a FxIndexMap<ty::LateParamRegionKind, ty::LateParamRegionKind>,
+    mapping: FxIndexMap<ty::LateParamRegionKind, ty::LateParamRegionKind>,
 }
 
-impl<'tcx> TypeFolder<TyCtxt<'tcx>> for RemapLateParam<'_, 'tcx> {
+impl<'tcx> TypeFolder<TyCtxt<'tcx>> for RemapLateParam<'tcx> {
     fn cx(&self) -> TyCtxt<'tcx> {
         self.tcx
     }
diff --git a/compiler/rustc_hir_analysis/src/check/compare_impl_item/refine.rs b/compiler/rustc_hir_analysis/src/check/compare_impl_item/refine.rs
index 494e9560c815..0e9e9b48ab30 100644
--- a/compiler/rustc_hir_analysis/src/check/compare_impl_item/refine.rs
+++ b/compiler/rustc_hir_analysis/src/check/compare_impl_item/refine.rs
@@ -299,8 +299,7 @@ fn report_mismatched_rpitit_signature<'tcx>(
     })
     .collect();
 
-    let mut return_ty =
-        trait_m_sig.output().fold_with(&mut super::RemapLateParam { tcx, mapping: &mapping });
+    let mut return_ty = trait_m_sig.output().fold_with(&mut super::RemapLateParam { tcx, mapping });
 
     if tcx.asyncness(impl_m_def_id).is_async() && tcx.asyncness(trait_m_def_id).is_async() {
         let ty::Alias(ty::Projection, future_ty) = return_ty.kind() else {