diff --git a/mongodb/mongodb.d.ts b/mongodb/mongodb.d.ts
index b96c43522..2efe834e2 100644
--- a/mongodb/mongodb.d.ts
+++ b/mongodb/mongodb.d.ts
@@ -642,7 +642,7 @@ declare module "mongodb" {
     //http://mongodb.github.io/node-mongodb-native/2.1/api/Collection.html#initializeOrderedBulkOp
     initializeOrderedBulkOp(options: CollectionOptions): OrderedBulkOperation; 	
     //http://mongodb.github.io/node-mongodb-native/2.1/api/Collection.html#initializeUnorderedBulkOp
-    initializeOrderedBulkOp(options: CollectionOptions): OrderedBulkOperation; 	
+    initializeUnorderedBulkOp(options: CollectionOptions): OrderedBulkOperation; 	
     //http://mongodb.github.io/node-mongodb-native/2.1/api/Collection.html#insertMany
     insertMany(docs: Object[], callback: MongoCallback<InsertWriteOpResult>): void
     insertMany(docs: Object[], options?: CollectionInsertManyOptions): Promise<InsertWriteOpResult>;