diff --git a/public/src/client/register.js b/public/src/client/register.js
index d8144d26d5..7ec16d0f97 100644
--- a/public/src/client/register.js
+++ b/public/src/client/register.js
@@ -136,6 +136,7 @@ define('forum/register', [
 					showSuccess(usernameInput, username_notify, successIcon);
 				} else {
 					showError(usernameInput, username_notify, '[[error:username-taken]]');
+					showError(usernameInput, username_notify, `[[error:username-taken. Maybe try ${username}suffix]]`);
 				}
 
 				callback();