diff --git a/src/services/utils.ts b/src/services/utils.ts
index b14ce5c71..c985c566e 100644
--- a/src/services/utils.ts
+++ b/src/services/utils.ts
@@ -173,7 +173,7 @@ function replaceAll(string: string, replaceWhat: string, replaceWith: string) {
     return string.replace(new RegExp(quotedReplaceWhat, "g"), replaceWith);
 }
 
-function formatDownloadTitle(fileName: string, type: string, mime: string) {
+function formatDownloadTitle(fileName: string, type: string | null, mime: string) {
     if (!fileName) {
         fileName = "untitled";
     }
@@ -182,7 +182,7 @@ function formatDownloadTitle(fileName: string, type: string, mime: string) {
 
     if (type === 'text') {
         return `${fileName}.html`;
-    } else if (['relationMap', 'canvas', 'search'].includes(type)) {
+    } else if (type && ['relationMap', 'canvas', 'search'].includes(type)) {
         return `${fileName}.json`;
     } else {
         if (!mime) {
diff --git a/src/share/routes.ts b/src/share/routes.ts
index 4c892e53c..51a0c2ff5 100644
--- a/src/share/routes.ts
+++ b/src/share/routes.ts
@@ -15,6 +15,7 @@ import log from "../services/log.js";
 import SNote from "./shaca/entities/snote.js";
 import SBranch from "./shaca/entities/sbranch.js";
 import SAttachment from "./shaca/entities/sattachment.js";
+import utils from "../services/utils.js";
 
 function getSharedSubTreeRoot(note: SNote): { note?: SNote; branch?: SBranch } {
     if (note.noteId === shareRoot.SHARE_ROOT_NOTE_ID) {
@@ -317,8 +318,6 @@ function register(router: Router) {
 
         addNoIndexHeader(attachment.note, res);
 
-        const utils = require('../services/utils');
-
         const filename = utils.formatDownloadTitle(attachment.title, null, attachment.mime);
 
         res.setHeader('Content-Disposition', utils.getContentDisposition(filename));