diff --git a/src/mongo_types.ts b/src/mongo_types.ts
index cc73d0d63b..e911aade8c 100644
--- a/src/mongo_types.ts
+++ b/src/mongo_types.ts
@@ -38,9 +38,11 @@ export type WithId<TSchema> = EnhancedOmit<TSchema, '_id'> & { _id: InferIdType<
  * `TSchema['_id'] extends ObjectId` which translated to "Is the _id property ObjectId?"
  * we instead ask "Does ObjectId look like (have the same shape) as the _id?"
  */
-export type OptionalId<TSchema extends { _id?: any }> = ObjectId extends TSchema['_id'] // a Schema with ObjectId _id type or "any" or "indexed type" provided
-  ? EnhancedOmit<TSchema, '_id'> & { _id?: InferIdType<TSchema> } // a Schema provided but _id type is not ObjectId
-  : WithId<TSchema>; // TODO(NODE-3285): Improve type readability
+export type OptionalId<TSchema> = TSchema extends { _id?: any }
+  ? ObjectId extends TSchema['_id'] // a Schema with ObjectId _id type or "any" or "indexed type" provided
+    ? EnhancedOmit<TSchema, '_id'> & { _id?: InferIdType<TSchema> } // a Schema provided but _id type is not ObjectId
+    : WithId<TSchema>
+  : EnhancedOmit<TSchema, '_id'> & { _id?: InferIdType<TSchema> }; // TODO(NODE-3285): Improve type readability
 
 /** TypeScript Omit (Exclude to be specific) does not work for objects with an "any" indexed type, and breaks discriminated unions @public */
 export type EnhancedOmit<TRecordOrUnion, KeyUnion> = string extends keyof TRecordOrUnion