SERVER-20660 fix mongos to not pass sortKey meta-projection with a $natural sort

1 files changed, 2 insertions, 2 deletions

diff --git a/src/mongo/s/query/cluster_find.cpp b/src/mongo/s/query/cluster_find.cpp
index 92ac88152ef..81aa71e2d36 100644
--- a/src/mongo/s/query/cluster_find.cpp
+++ b/src/mongo/s/query/cluster_find.cpp
@@ -89,9 +89,9 @@ std::unique_ptr<LiteParsedQuery> transformQueryForShards(const LiteParsedQuery&
         newNToReturn = *lpq.getNToReturn() + lpq.getSkip().value_or(0);
     }
 
-    // If there is a sort, we send a sortKey meta-projection to the remote node.
+    // If there is a sort other than $natural, we send a sortKey meta-projection to the remote node.
     BSONObj newProjection = lpq.getProj();
-    if (!lpq.getSort().isEmpty()) {
+    if (!lpq.getSort().isEmpty() && !lpq.getSort()["$natural"]) {
         BSONObjBuilder projectionBuilder;
         projectionBuilder.appendElements(lpq.getProj());
         projectionBuilder.append(ClusterClientCursorParams::kSortKeyField, kSortKeyMetaProjection);