diff --git a/src/librustc/hir/lowering.rs b/src/librustc/hir/lowering.rs
index 1bfff138d8dc..d6ad335525c1 100644
--- a/src/librustc/hir/lowering.rs
+++ b/src/librustc/hir/lowering.rs
@@ -1431,7 +1431,6 @@ impl<'a> LoweringContext<'a> {
                         parent_def_index,
                         impl_trait_node_id,
                         DefPathData::ImplTrait,
-                        DefIndexAddressSpace::High,
                         Mark::root(),
                         DUMMY_SP
                     );
diff --git a/src/libsyntax_pos/symbol.rs b/src/libsyntax_pos/symbol.rs
index 8847e94127be..4e080d115d2a 100644
--- a/src/libsyntax_pos/symbol.rs
+++ b/src/libsyntax_pos/symbol.rs
@@ -141,6 +141,7 @@ symbols! {
         arm_target_feature,
         asm,
         associated_consts,
+        associated_type_bounds,
         associated_type_defaults,
         associated_types,
         async_await,