1 files changed, 1 insertions, 1 deletions
diff --git a/src/mongo/db/storage/sorted_data_interface_test_harness.cpp b/src/mongo/db/storage/sorted_data_interface_test_harness.cpp
index 101a90bbe78..a756d8303ae 100644
--- a/src/mongo/db/storage/sorted_data_interface_test_harness.cpp
+++ b/src/mongo/db/storage/sorted_data_interface_test_harness.cpp
@@ -68,7 +68,7 @@ void mongo::removeFromIndex(OperationContext* opCtx,
 
 mongo::KeyString::Value mongo::makeKeyString(SortedDataInterface* sorted,
                                              BSONObj bsonKey,
-                                             boost::optional<RecordId> rid) {
+                                             const boost::optional<RecordId>& rid) {
     KeyString::Builder builder(sorted->getKeyStringVersion(), bsonKey, sorted->getOrdering());
     if (rid) {
         builder.appendRecordId(*rid);