diff --git a/src/librustc_resolve/build_reduced_graph.rs b/src/librustc_resolve/build_reduced_graph.rs
index 9f4d35525a86a..1510d74babb6d 100644
--- a/src/librustc_resolve/build_reduced_graph.rs
+++ b/src/librustc_resolve/build_reduced_graph.rs
@@ -16,6 +16,7 @@ use crate::{ResolutionError, Determinacy, PathResult, CrateLint};
 use rustc::bug;
 use rustc::hir::def::{self, *};
 use rustc::hir::def_id::{CRATE_DEF_INDEX, LOCAL_CRATE, DefId};
+use rustc::hir::map::DefCollector;
 use rustc::ty;
 use rustc::middle::cstore::CrateStore;
 use rustc_metadata::cstore::LoadedMacro;
@@ -162,10 +163,20 @@ impl<'a> Resolver<'a> {
     crate fn build_reduced_graph(
         &mut self, fragment: &AstFragment, parent_scope: ParentScope<'a>
     ) -> LegacyScope<'a> {
+        fragment.visit_with(&mut DefCollector::new(&mut self.definitions, parent_scope.expansion));
         let mut visitor = BuildReducedGraphVisitor { r: self, parent_scope };
         fragment.visit_with(&mut visitor);
         visitor.parent_scope.legacy
     }
+
+    crate fn build_reduced_graph_external(&mut self, module: Module<'a>) {
+        let def_id = module.def_id().expect("unpopulated module without a def-id");
+        for child in self.cstore.item_children_untracked(def_id, self.session) {
+            let child = child.map_id(|_| panic!("unexpected id"));
+            BuildReducedGraphVisitor { r: self, parent_scope: ParentScope::module(module) }
+                .build_reduced_graph_for_external_crate_res(child);
+        }
+    }
 }
 
 struct BuildReducedGraphVisitor<'a, 'b> {
diff --git a/src/librustc_resolve/lib.rs b/src/librustc_resolve/lib.rs
index 1c1448c9aa123..12c4f5bfe8e61 100644
--- a/src/librustc_resolve/lib.rs
+++ b/src/librustc_resolve/lib.rs
@@ -59,7 +59,6 @@ use std::collections::BTreeSet;
 use rustc_data_structures::ptr_key::PtrKey;
 use rustc_data_structures::sync::Lrc;
 
-use build_reduced_graph::BuildReducedGraphVisitor;
 use diagnostics::{Suggestion, ImportSuggestion};
 use diagnostics::{find_span_of_binding_until_next_binding, extend_span_to_previous_binding};
 use late::{PathSource, Rib, RibKind::*};
@@ -1261,12 +1260,7 @@ impl<'a> Resolver<'a> {
     fn resolutions(&mut self, module: Module<'a>) -> &'a Resolutions<'a> {
         if module.populate_on_access.get() {
             module.populate_on_access.set(false);
-            let def_id = module.def_id().expect("unpopulated module without a def-id");
-            for child in self.cstore.item_children_untracked(def_id, self.session) {
-                let child = child.map_id(|_| panic!("unexpected id"));
-                BuildReducedGraphVisitor { parent_scope: self.dummy_parent_scope(), r: self }
-                    .build_reduced_graph_for_external_crate_res(module, child);
-            }
+            self.build_reduced_graph_external(module);
         }
         &module.lazy_resolutions
     }
diff --git a/src/librustc_resolve/macros.rs b/src/librustc_resolve/macros.rs
index 079145e816cd5..6f49377c187aa 100644
--- a/src/librustc_resolve/macros.rs
+++ b/src/librustc_resolve/macros.rs
@@ -8,7 +8,6 @@ use crate::{ModuleOrUniformRoot, KNOWN_TOOLS};
 use crate::Namespace::*;
 use crate::resolve_imports::ImportResolver;
 use rustc::hir::def::{self, DefKind, NonMacroAttrKind};
-use rustc::hir::map::DefCollector;
 use rustc::middle::stability;
 use rustc::{ty, lint, span_bug};
 use syntax::ast::{self, Ident};
@@ -131,7 +130,6 @@ impl<'a> base::Resolver for Resolver<'a> {
         parent_scope.module.unresolved_invocations.borrow_mut().extend(derives);
 
         // Integrate the new AST fragment into all the definition and module structures.
-        fragment.visit_with(&mut DefCollector::new(&mut self.definitions, expansion));
         let output_legacy_scope = self.build_reduced_graph(fragment, parent_scope);
         self.output_legacy_scopes.insert(expansion, output_legacy_scope);
     }