diff --git a/compiler/rustc_middle/src/hir/map/mod.rs b/compiler/rustc_middle/src/hir/map/mod.rs
index ebda9f7588d5d..6ff7fc085681f 100644
--- a/compiler/rustc_middle/src/hir/map/mod.rs
+++ b/compiler/rustc_middle/src/hir/map/mod.rs
@@ -168,6 +168,10 @@ impl<'hir> Map<'hir> {
         par_for_each_in(&self.tcx.hir_crate_items(()).items[..], |id| f(*id));
     }
 
+    pub fn par_for_each_item_in_module(self, module: LocalDefId, f: impl Fn(ItemId) + Sync + Send) {
+        par_for_each_in(&self.tcx.hir_module_items(module).items[..], |id| f(*id));
+    }
+
     pub fn def_key(self, def_id: LocalDefId) -> DefKey {
         // Accessing the DefKey is ok, since it is part of DefPathHash.
         self.tcx.untracked_resolutions.definitions.def_key(def_id)