diff --git a/app/javascript/mastodon/polyfills/base_polyfills.ts b/app/javascript/mastodon/polyfills/base_polyfills.ts
index 71565236cd..047e9f8d41 100644
--- a/app/javascript/mastodon/polyfills/base_polyfills.ts
+++ b/app/javascript/mastodon/polyfills/base_polyfills.ts
@@ -1,4 +1,5 @@
 import 'core-js/features/object/assign';
+import 'core-js/features/object/has-own';
 import 'core-js/features/object/values';
 import 'core-js/features/symbol';
 import 'core-js/features/promise/finally';