diff --git a/packages/fineui/src/core/platform/web/load.js b/packages/fineui/src/core/platform/web/load.js
index 8a43934dd..d010bdb54 100644
--- a/packages/fineui/src/core/platform/web/load.js
+++ b/packages/fineui/src/core/platform/web/load.js
@@ -105,7 +105,7 @@ export function loadScript(uri) {
         document.head.appendChild(script);
     });
 
-    promises[uri] ??= [];
+    promises[uri] = [];
     promises[uri].push(promise);
 
     return Promise.all(promises[uri]);