diff --git a/js/components/FileChooser.tsx b/js/components/FileChooser.tsx
index e9d303c..88492cf 100644
--- a/js/components/FileChooser.tsx
+++ b/js/components/FileChooser.tsx
@@ -176,8 +176,8 @@ export const FileChooser = ({
                 name: file.name,
                 getFile: () => Promise.resolve(file),
                 createWritable: (_options) => Promise.reject('File not writable.'),
-                queryPermission: (descriptor) => Promise.resolve(descriptor === 'read' ? 'granted' : 'denied'),
-                requestPermission: (descriptor) => Promise.resolve(descriptor === 'read' ? 'granted' : 'denied'),
+                queryPermission: (descriptor) => Promise.resolve(descriptor?.mode === 'read' ? 'granted' : 'denied'),
+                requestPermission: (descriptor) => Promise.resolve(descriptor?.mode === 'read' ? 'granted' : 'denied'),
                 isSameEntry: (_unused) => Promise.resolve(false),
                 isDirectory: false,
                 isFile: true,