diff --git a/lib/web/imageRouter/filesystem.ts b/lib/web/imageRouter/filesystem.ts
index 79aefa0db..a1b6b3fc8 100644
--- a/lib/web/imageRouter/filesystem.ts
+++ b/lib/web/imageRouter/filesystem.ts
@@ -17,7 +17,7 @@ const FilesystemUploadProvider: UploadProvider = {
       return
     }
 
-    callback(null, (new URL(path.basename(imagePath), config.serverURL + '/uploads/')).href)
+    callback(undefined, (new URL(path.basename(imagePath), config.serverURL + '/uploads/')).href)
   }
 }
 
diff --git a/lib/web/imageRouter/imgur.ts b/lib/web/imageRouter/imgur.ts
index b3ae606b1..487c1599a 100644
--- a/lib/web/imageRouter/imgur.ts
+++ b/lib/web/imageRouter/imgur.ts
@@ -20,7 +20,7 @@ const ImgurUploadProvider: UploadProvider = {
     imgur.uploadFile(imagePath)
       .then(function (json) {
         logger.debug(`SERVER uploadimage success: ${JSON.stringify(json)}`)
-        callback(null, json.data.link.replace(/^http:\/\//i, 'https://'))
+        callback(undefined, json.data.link.replace(/^http:\/\//i, 'https://'))
       }).catch(function (err) {
         callback(new Error(err), undefined)
       })