diff --git a/public/src/client/register.js b/public/src/client/register.js
index f989901e7b..09707dc276 100644
--- a/public/src/client/register.js
+++ b/public/src/client/register.js
@@ -135,7 +135,8 @@ define('forum/register', [
 				if (results.every(obj => obj.status === 'rejected')) {
 					showSuccess(usernameInput, username_notify, successIcon);
 				} else {
-					showError(usernameInput, username_notify, '[[error:username-taken]]');
+					const suggestions = [1, 2, 3].map(n => username + n).join(', ');
+					showError(usernameInput, username_notify, '[[error:username-taken]] Try: ' + suggestions);
 				}
 
 				callback();