From d1d921f5db93762ec92c974fb39cba98ba9b6a1f Mon Sep 17 00:00:00 2001
From: Luke Stephenson <luke.stephenson@gmail.com>
Date: Tue, 14 Oct 2025 15:21:35 +1100
Subject: [PATCH] Support nModified being optional in bulk write response

---
 .../mongodb/internal/operation/ClientBulkWriteOperation.java    | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/driver-core/src/main/com/mongodb/internal/operation/ClientBulkWriteOperation.java b/driver-core/src/main/com/mongodb/internal/operation/ClientBulkWriteOperation.java
index 2b9e79f6f06..5b38d5d320c 100644
--- a/driver-core/src/main/com/mongodb/internal/operation/ClientBulkWriteOperation.java
+++ b/driver-core/src/main/com/mongodb/internal/operation/ClientBulkWriteOperation.java
@@ -775,7 +775,7 @@ ClientBulkWriteResult build(@Nullable final MongoException topLevelError, final
                                         writeModelIndex,
                                         new ConcreteClientUpdateResult(
                                                 individualOperationResponse.getInt32("n").getValue(),
-                                                individualOperationResponse.getInt32("nModified").getValue(),
+                                                individualOperationResponse.getInt32("nModified", new BsonInt32(0)).getValue(),
                                                 upsertedIdDocument == null ? null : upsertedIdDocument.get("_id")));
                             } else if (writeModel instanceof ConcreteClientNamespacedDeleteOneModel
                                     || writeModel instanceof ConcreteClientNamespacedDeleteManyModel) {