diff --git a/lib/index.js b/lib/index.js
index 6d6e22e..3fc8d7f 100644
--- a/lib/index.js
+++ b/lib/index.js
@@ -62,11 +62,10 @@ const { decrypt } = require('./encryption')
 
 /**
  * @template T
- * @typedef {(...args: [Error] | [null, T]) => void} CB
- */
-
-/**
- * @typedef {(...args: [Error] | []) => void} CBVoid
+ * @typedef {T extends void ?
+ *   (...args: [Error] | []) => void :
+ *   (...args: [Error] | [null, T]) => void
+ * } CB
  */
 
 class DBTangle extends MsgV3.Tangle {
@@ -916,7 +915,7 @@ function initDB(peer, config) {
 
   /**
    * @param {string} msgID
-   * @param {CBVoid} cb
+   * @param {CB<void>} cb
    */
   function del(msgID, cb) {
     const rec = getRecord(msgID)
@@ -931,7 +930,7 @@ function initDB(peer, config) {
 
   /**
    * @param {string} msgID
-   * @param {CBVoid} cb
+   * @param {CB<void>} cb
    */
   function erase(msgID, cb) {
     const rec = getRecord(msgID)