diff --git a/app/controllers/api/projects.php b/app/controllers/api/projects.php
index 86845f0dd..72f52050e 100644
--- a/app/controllers/api/projects.php
+++ b/app/controllers/api/projects.php
@@ -776,7 +776,7 @@ App::post('/v1/projects/:projectId/keys')
     ->param('projectId', null, new UID(), 'Project unique ID.')
     ->param('name', null, new Text(128), 'Key name. Max length: 128 chars.')
     ->param('scopes', null, new ArrayList(new WhiteList(array_keys(Config::getParam('scopes')), true), APP_LIMIT_ARRAY_PARAMS_SIZE), 'Key scopes list. Maximum of ' . APP_LIMIT_ARRAY_PARAMS_SIZE . ' scopes are allowed.')
-    ->param('expire', 0, new Integer() , 'Key expiration timestamp', true)
+    ->param('expire', 0, new Integer() , 'Key expiration time in Unix timestamp.', true)
     ->inject('response')
     ->inject('dbForConsole')
     ->action(function (string $projectId, string $name, array $scopes, int $expire, Response $response, Database $dbForConsole) {