diff --git a/lib/legacy/legacy-element-mixin.js b/lib/legacy/legacy-element-mixin.js
index 1e903d5285..963e496853 100644
--- a/lib/legacy/legacy-element-mixin.js
+++ b/lib/legacy/legacy-element-mixin.js
@@ -122,8 +122,8 @@ export const LegacyElementMixin = dedupingMixin((base) => {
      * @override
      */
     connectedCallback() {
-      this.isAttached = true;
       super.connectedCallback();
+      this.isAttached = true;
       this.attached();
     }