1 files changed, 1 insertions, 1 deletions
diff --git a/src/mongo/db/index/btree_access_method.h b/src/mongo/db/index/btree_access_method.h
index 8f0e6304d20..5621c99933f 100644
--- a/src/mongo/db/index/btree_access_method.h
+++ b/src/mongo/db/index/btree_access_method.h
@@ -60,7 +60,7 @@ private:
                    KeyStringSet* keys,
                    KeyStringSet* multikeyMetadataKeys,
                    MultikeyPaths* multikeyPaths,
-                   boost::optional<RecordId> id) const final;
+                   const boost::optional<RecordId>& id) const final;
 
     // Our keys differ for V0 and V1.
     std::unique_ptr<BtreeKeyGenerator> _keyGenerator;