diff --git a/src/horizon/horizon_api.ts b/src/horizon/horizon_api.ts
index 646bf3266..ce9900de2 100644
--- a/src/horizon/horizon_api.ts
+++ b/src/horizon/horizon_api.ts
@@ -290,6 +290,8 @@ export namespace HorizonApi {
     asset_code?: string;
     asset_issuer?: string;
     amount: string;
+    to_muxed?: string;
+    to_muxed_id?: string;
   }
   export interface PathPaymentOperationResponse
     extends BaseOperationResponse<