diff --git a/src/librustc_mir/monomorphize/collector.rs b/src/librustc_mir/monomorphize/collector.rs
index bd94e573c6f3..dae5f1b8cd25 100644
--- a/src/librustc_mir/monomorphize/collector.rs
+++ b/src/librustc_mir/monomorphize/collector.rs
@@ -1183,11 +1183,11 @@ fn collect_miri<'a, 'tcx>(
 ) {
     let alloc_kind = tcx.alloc_map.lock().get(alloc_id);
     match alloc_kind {
-        Some(GlobalAlloc::Static(did)) => {
-            let instance = Instance::mono(tcx, did);
+        Some(GlobalAlloc::Static(def_id)) => {
+            let instance = Instance::mono(tcx, def_id);
             if should_monomorphize_locally(tcx, &instance) {
-                trace!("collecting static {:?}", did);
-                output.push(MonoItem::Static(did));
+                trace!("collecting static {:?}", def_id);
+                output.push(MonoItem::Static(def_id));
             }
         }
         Some(GlobalAlloc::Memory(alloc)) => {
@@ -1263,7 +1263,7 @@ fn collect_const<'a, 'tcx>(
                 collect_miri(tcx, id, output);
             }
         }
-        ConstValue::Unevaluated(did, substs) => {
+        ConstValue::Unevaluated(def_id, substs) => {
             let param_env = ty::ParamEnv::reveal_all();
             let substs = tcx.subst_and_normalize_erasing_regions(
                 param_substs,
@@ -1272,7 +1272,7 @@ fn collect_const<'a, 'tcx>(
             );
             let instance = ty::Instance::resolve(tcx,
                                                 param_env,
-                                                did,
+                                                def_id,
                                                 substs).unwrap();
 
             let cid = GlobalId {
@@ -1283,7 +1283,7 @@ fn collect_const<'a, 'tcx>(
                 Ok(val) => collect_const(tcx, val, param_substs, output),
                 Err(ErrorHandled::Reported) => {},
                 Err(ErrorHandled::TooGeneric) => span_bug!(
-                    tcx.def_span(did), "collection encountered polymorphic constant",
+                    tcx.def_span(def_id), "collection encountered polymorphic constant",
                 ),
             }
         }