diff --git a/extension/src/shared/form-affordances/url-tools.ts b/extension/src/shared/form-affordances/url-tools.ts
index 93e8d13..5f71646 100644
--- a/extension/src/shared/form-affordances/url-tools.ts
+++ b/extension/src/shared/form-affordances/url-tools.ts
@@ -1,7 +1,7 @@
 import { GLYPH_FILL_FROM_TAB } from '../glyphs';
 
 export interface FillFromTabOpts {
-  sendMessage: (msg: { type: 'get_active_tab_url' }) => Promise<{ ok: boolean; data?: { url: string; title: string } | null }>;
+  sendMessage: (msg: { type: 'get_active_tab_url' }) => Promise<{ ok: boolean; data: { url: string; title: string } | null }>;
 }
 
 export function wireFillFromTab(form: HTMLElement, opts: FillFromTabOpts): void {