diff --git a/src/authentication/db-connection.js b/src/authentication/db-connection.js
index 2cde1940..d7f4b069 100644
--- a/src/authentication/db-connection.js
+++ b/src/authentication/db-connection.js
@@ -26,7 +26,7 @@ function DBConnection(request, options) {
  * @param {String} options.password user password
  * @param {String} [options.username] user desired username. Required if you use a database connection and you have enabled `Requires Username`
  * @param {String} options.connection name of the connection where the user will be created
- * @param {Object} [options.userMetadata] additional signup attributes used for creating the user. Will be stored in `user_metadata`
+ * @param {Object} [options.user_metadata] additional signup attributes used for creating the user. Will be stored in `user_metadata`
  * @param {signUpCallback} cb
  * @see   {@link https://auth0.com/docs/api/authentication#signup}
  */