diff --git a/types/image-preview.d.ts b/types/image-preview.d.ts
index 42668cc58..10764b9e1 100644
--- a/types/image-preview.d.ts
+++ b/types/image-preview.d.ts
@@ -23,6 +23,7 @@ export type ImagePreviewOptions =
       closeIconPosition?: string;
       getContainer?: string | (() => Element);
       onClose?(): void;
+      onScale?(data: { index: number; scale: number }): void;
       onChange?(index: number): void;
       swipeTo?(index: number, options?: SwipeToOptions): void;
     };