diff --git a/public/language/en-US/error.json b/public/language/en-US/error.json
index ea28a9a51c..2a7659b756 100644
--- a/public/language/en-US/error.json
+++ b/public/language/en-US/error.json
@@ -33,6 +33,7 @@
     "folder-exists": "Folder exists",
     "invalid-pagination-value": "Invalid pagination value, must be at least %1 and at most %2",
     "username-taken": "Username taken",
+    "username-taken-suggestion": "Username is already taken. Maybe try \"%1_suffix\"?",
     "email-taken": "Email address is already taken.",
     "email-nochange": "The email entered is the same as the email already on file.",
     "email-invited": "Email was already invited",
diff --git a/public/src/client/register.js b/public/src/client/register.js
index f989901e7b..2930742086 100644
--- a/public/src/client/register.js
+++ b/public/src/client/register.js
@@ -135,7 +135,7 @@ define('forum/register', [
 				if (results.every(obj => obj.status === 'rejected')) {
 					showSuccess(usernameInput, username_notify, successIcon);
 				} else {
-					showError(usernameInput, username_notify, '[[error:username-taken]]');
+					showError(usernameInput, username_notify, `[[error:username-taken-suggestion, ${username}]]`);
 				}
 
 				callback();