1 files changed, 3 insertions, 1 deletions
diff --git a/compiler/rustc_trait_selection/src/traits/select/mod.rs b/compiler/rustc_trait_selection/src/traits/select/mod.rs
index 5581ea46882..0cc0d7f786b 100644
--- a/compiler/rustc_trait_selection/src/traits/select/mod.rs
+++ b/compiler/rustc_trait_selection/src/traits/select/mod.rs
@@ -32,6 +32,7 @@ use rustc_middle::ty::{
     TypingMode, Upcast,
 };
 use rustc_span::{Symbol, sym};
+use rustc_type_ir::elaborate;
 use tracing::{debug, instrument, trace};
 
 use self::EvaluationResult::*;
@@ -2531,7 +2532,8 @@ impl<'tcx> SelectionContext<'_, 'tcx> {
         let a_auto_traits: FxIndexSet<DefId> = a_data
             .auto_traits()
             .chain(a_data.principal_def_id().into_iter().flat_map(|principal_def_id| {
-                tcx.supertrait_def_ids(principal_def_id).filter(|def_id| tcx.trait_is_auto(*def_id))
+                elaborate::supertrait_def_ids(tcx, principal_def_id)
+                    .filter(|def_id| tcx.trait_is_auto(*def_id))
             }))
             .collect();