diff --git a/src/mir.rs b/src/mir.rs
index 986a264..0f57c4e 100644
--- a/src/mir.rs
+++ b/src/mir.rs
@@ -205,7 +205,8 @@ impl<'tcx> AnalysisCtxt<'tcx> {
             | ty::InstanceDef::DropGlue(..)
             | ty::InstanceDef::CloneShim(..)
             | ty::InstanceDef::ThreadLocalShim(..)
-            | ty::InstanceDef::FnPtrAddrShim(..) => self.mir_shims(instance),
+            | ty::InstanceDef::FnPtrAddrShim(..)
+            | ty::InstanceDef::AsyncDropGlueCtorShim(..) => self.mir_shims(instance),
         }
     }
 }
diff --git a/src/monomorphize_collector.rs b/src/monomorphize_collector.rs
index 977e945..1be18f7 100644
--- a/src/monomorphize_collector.rs
+++ b/src/monomorphize_collector.rs
@@ -731,13 +731,14 @@ fn visit_instance_use<'tcx>(
         ty::InstanceDef::ThreadLocalShim(..) => {
             bug!("{:?} being reified", instance);
         }
-        ty::InstanceDef::DropGlue(_, None) => {
+        ty::InstanceDef::DropGlue(_, None) | ty::InstanceDef::AsyncDropGlueCtorShim(_, None) => {
             // Don't need to emit noop drop glue if we are calling directly.
             if !is_direct_call {
                 output.push(create_fn_mono_item(tcx, instance, source));
             }
         }
         ty::InstanceDef::DropGlue(_, Some(_))
+        | ty::InstanceDef::AsyncDropGlueCtorShim(_, Some(_))
         | ty::InstanceDef::VTableShim(..)
         | ty::InstanceDef::ReifyShim(..)
         | ty::InstanceDef::ClosureOnceShim { .. }