diff --git a/public/src/client/register.js b/public/src/client/register.js
index f989901e7b..5571bf700c 100644
--- a/public/src/client/register.js
+++ b/public/src/client/register.js
@@ -115,7 +115,7 @@ define('forum/register', [
 	};
 
 	function validateUsername(username, callback) {
-		callback = callback || function () {};
+		callback = callback || function () { };
 
 		const username_notify = $('#username-notify');
 		username_notify.text('');
@@ -135,7 +135,10 @@ define('forum/register', [
 				if (results.every(obj => obj.status === 'rejected')) {
 					showSuccess(usernameInput, username_notify, successIcon);
 				} else {
-					showError(usernameInput, username_notify, '[[error:username-taken]]');
+					var nameValue = usernameInput.val ? usernameInput.val() : usernameInput.value;
+
+					var suggestion = nameValue + '_' + generateRandomWord();
+					showError(usernameInput, username_notify, '[[error:username-taken]]' + '. Maybe try ' + suggestion);
 				}
 
 				callback();
@@ -143,6 +146,20 @@ define('forum/register', [
 		}
 	}
 
+	function generateRandomWord(length = 5) {
+		let word = '';
+
+		for (let i = 0; i < length; i++) {
+
+			const asciiCode = Math.floor(Math.random() * 26) + 97;
+
+			// Convert the numeric ASCII code into a string character
+			word += String.fromCharCode(asciiCode);
+		}
+
+		return word;
+	}
+
 	function validatePassword(password, password_confirm) {
 		const passwordInput = $('#password');
 		const password_notify = $('#password-notify');