diff --git a/public/language/en-US/error.json b/public/language/en-US/error.json
index ea28a9a51c..89a4b87c73 100644
--- a/public/language/en-US/error.json
+++ b/public/language/en-US/error.json
@@ -32,7 +32,7 @@
     "invalid-path": "Invalid path",
     "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": "Username taken. Maybe try %1",
     "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",
@@ -265,4 +265,4 @@
     "activitypub.origin-mismatch": "The received object's origin does not match the sender's origin",
     "activitypub.actor-mismatch": "The received activity is being carried out by an actor that is different from expected.",
     "activitypub.not-implemented": "The request was denied because it or an aspect of it is not implemented by the recipient server"
-}
\ No newline at end of file
+}
diff --git a/public/src/client/register.js b/public/src/client/register.js
index f989901e7b..074f246421 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, "${username}suffix"]]`);
 				}
 
 				callback();