diff --git a/ts/a11y/explorer/KeyExplorer.ts b/ts/a11y/explorer/KeyExplorer.ts
index ef52735d6..33c1b9406 100644
--- a/ts/a11y/explorer/KeyExplorer.ts
+++ b/ts/a11y/explorer/KeyExplorer.ts
@@ -1461,6 +1461,7 @@ export class SpeechExplorer
         if (
           child !== this.speech &&
           child !== this.img &&
+          child.tagName &&
           child.tagName.toLowerCase() !== 'rect'
         ) {
           const { left, right, top, bottom } = child.getBoundingClientRect();