diff --git a/lib/note/index.js b/lib/note/index.js
index 33993ab1..be18bc4f 100644
--- a/lib/note/index.js
+++ b/lib/note/index.js
@@ -34,7 +34,7 @@ async function getNoteById (noteId, { includeUser } = { includeUser: false }) {
 }
 
 async function createNote (userId, noteAlias) {
-  if (!config.allowAnonymous && !!userId) {
+  if (!config.allowAnonymous && !userId) {
     throw new Error('can not create note')
   }