diff --git a/packages/objectloader2/src/core/objectLoader2Factory.ts b/packages/objectloader2/src/core/objectLoader2Factory.ts
index 8dc845a27..74cdf8c22 100644
--- a/packages/objectloader2/src/core/objectLoader2Factory.ts
+++ b/packages/objectloader2/src/core/objectLoader2Factory.ts
@@ -40,7 +40,7 @@ export class ObjectLoader2Factory {
     token?: string
     headers?: Headers
     options?: ObjectLoader2FactoryOptions
-    attributeMask: ObjectAttributeMask
+    attributeMask?: ObjectAttributeMask
   }): ObjectLoader2 {
     const log = ObjectLoader2Factory.getLogger(params.options?.logger)
     let database
diff --git a/packages/objectloader2/src/core/stages/serverDownloader.ts b/packages/objectloader2/src/core/stages/serverDownloader.ts
index b1b38f01b..da869776f 100644
--- a/packages/objectloader2/src/core/stages/serverDownloader.ts
+++ b/packages/objectloader2/src/core/stages/serverDownloader.ts
@@ -13,7 +13,7 @@ export interface ServerDownloaderOptions {
   headers?: Headers
   logger: CustomLogger
   fetch?: Fetcher
-  attributeMask: ObjectAttributeMask
+  attributeMask?: ObjectAttributeMask
 }
 
 const MAX_SAFARI_DECODE_BYTES = 2 * 1024 * 1024 * 1024 - 1024 * 1024 // 2GB minus a margin
diff --git a/packages/objectloader2/src/types/types.ts b/packages/objectloader2/src/types/types.ts
index 2b26ab29a..b5333b904 100644
--- a/packages/objectloader2/src/types/types.ts
+++ b/packages/objectloader2/src/types/types.ts
@@ -20,4 +20,7 @@ export interface DataChunk extends Base {
   data?: Base[]
 }
 
-export type ObjectAttributeMask = { include: string[] } | { exclude: string[] }
+export type ObjectAttributeMask =
+  | { include: string[] }
+  | { exclude: string[] }
+  | undefined