diff --git a/packages/types/src/types/extrinsic.ts b/packages/types/src/types/extrinsic.ts
index c934f174364f..c76dbc6cf385 100644
--- a/packages/types/src/types/extrinsic.ts
+++ b/packages/types/src/types/extrinsic.ts
@@ -163,7 +163,7 @@ export interface SignatureOptions {
   signedExtensions?: string[];
   signer?: Signer;
   tip?: AnyNumber;
-  assetId?: AnyNumber;
+  assetId?: AnyNumber | object;
 }
 
 interface ExtrinsicSignatureBase {
@@ -184,7 +184,7 @@ export interface ExtrinsicPayloadValue {
   specVersion: AnyNumber;
   tip: AnyNumber;
   transactionVersion: AnyNumber;
-  assetId?: AnyNumber;
+  assetId?: AnyNumber | object;
 }
 
 export interface IExtrinsicSignature extends ExtrinsicSignatureBase, Codec {