diff --git a/runtime.d.ts b/runtime.d.ts
index d5dafbe8..910283f9 100644
--- a/runtime.d.ts
+++ b/runtime.d.ts
@@ -2899,6 +2899,7 @@ type CoreMixin = {
     readonly dom: { [key: string]: HTMLElement }
     /** dom样式 */
     readonly domStyle: {
+        ratio: number,
         scale: number,
         isVertical: boolean,
         showStatusBar: boolean,