1 files changed, 3 insertions, 2 deletions
diff --git a/compiler/rustc_infer/src/traits/engine.rs b/compiler/rustc_infer/src/traits/engine.rs
index c495810858f..e27e6a0a4a1 100644
--- a/compiler/rustc_infer/src/traits/engine.rs
+++ b/compiler/rustc_infer/src/traits/engine.rs
@@ -1,7 +1,8 @@
 use crate::infer::InferCtxt;
 use crate::traits::Obligation;
 use rustc_hir::def_id::DefId;
-use rustc_middle::ty::{self, ToPredicate, Ty};
+use rustc_macros::extension;
+use rustc_middle::ty::{self, Ty, Upcast};
 
 use super::FulfillmentError;
 use super::{ObligationCause, PredicateObligation};
@@ -25,7 +26,7 @@ pub trait TraitEngine<'tcx>: 'tcx {
                 cause,
                 recursion_depth: 0,
                 param_env,
-                predicate: ty::Binder::dummy(trait_ref).to_predicate(infcx.tcx),
+                predicate: trait_ref.upcast(infcx.tcx),
             },
         );
     }