diff --git a/ts/src/browser.ts b/ts/src/browser.ts
index 36a3c54..bddef1b 100644
--- a/ts/src/browser.ts
+++ b/ts/src/browser.ts
@@ -547,7 +547,7 @@ const AnimationEditor: m.Component<{ si: number; ei: number; el: MonoDisplay.Mon
     }
 
     return m(".anim-editor",
-      m(".anim-frame-tabs",
+      m(".anim-frame-tabs", { key: "tabs" },
         el.frames.map((_, fi) =>
           m(".anim-frame-tab", {
             class: fi === state.activeFrame ? "active" : "",