diff --git a/apps/client/src/widgets/find_in_html.ts b/apps/client/src/widgets/find_in_html.ts
index 4885fda31..e8ae8b5ab 100644
--- a/apps/client/src/widgets/find_in_html.ts
+++ b/apps/client/src/widgets/find_in_html.ts
@@ -83,7 +83,7 @@ export default class FindInHtml {
 
     async findBoxClosed(totalFound: number, currentFound: number) {
         const $content = await this.parent?.noteContext?.getContentElement();
-        if ($content) {
+        if (typeof $content?.unmark === 'function') {
             $content.unmark();
         }
     }