diff --git a/denops/docbase/handler/buffer.ts b/denops/docbase/handler/buffer.ts
index 159aa85..fdb48a6 100644
--- a/denops/docbase/handler/buffer.ts
+++ b/denops/docbase/handler/buffer.ts
@@ -44,6 +44,7 @@ export async function prepareProxy(
       await option.swapfile.setLocal(denops, false);
       await option.buftype.setLocal(denops, "acwrite");
       await option.filetype.setLocal(denops, ft);
+      await option.bufhidden.setLocal(denops, "delete");
     });
 
     await group(denops, "docbase-writecmd", (helper) => {