diff --git a/dump.rdb b/dump.rdb
new file mode 100644
index 0000000000..51f9764463
Binary files /dev/null and b/dump.rdb differ
diff --git a/public/src/client/register.js b/public/src/client/register.js
index d8144d26d5..43cf83060a 100644
--- a/public/src/client/register.js
+++ b/public/src/client/register.js
@@ -121,6 +121,8 @@ define('forum/register', [
 		username_notify.text('');
 		const usernameInput = $('#username');
 		const userslug = slugify(username);
+		const suffix = 'suffix';
+
 		if (username.length < ajaxify.data.minimumUsernameLength || userslug.length < ajaxify.data.minimumUsernameLength) {
 			showError(usernameInput, username_notify, '[[error:username-too-short]]');
 		} else if (username.length > ajaxify.data.maximumUsernameLength) {
@@ -135,7 +137,8 @@ define('forum/register', [
 				if (results.every(obj => obj.status === 'rejected')) {
 					showSuccess(usernameInput, username_notify, successIcon);
 				} else {
-					showError(usernameInput, username_notify, '[[error:username-taken]]');
+					const suggestedUsername = username + suffix;
+					showError(usernameInput, username_notify, `[[error:username-taken]]. Maybe try: ${suggestedUsername}`);
 				}
 
 				callback();