diff --git a/packages/frontend/src/os.ts b/packages/frontend/src/os.ts
index 69d071a0e1..aafa1c4b21 100644
--- a/packages/frontend/src/os.ts
+++ b/packages/frontend/src/os.ts
@@ -481,7 +481,7 @@ export function inputDatetime(props: {
 			},
 		}, {
 			done: result => {
-				resolve(result ? { result: new Date(result.result), canceled: false } : { result: undefined, canceled: true });
+				resolve(result != null && result.result != null ? { result: new Date(result.result), canceled: false } : { result: undefined, canceled: true });
 			},
 			closed: () => dispose(),
 		});