diff --git a/src/Illuminate/Log/LogManager.php b/src/Illuminate/Log/LogManager.php
index b43afbacf435..7080e35c4b56 100644
--- a/src/Illuminate/Log/LogManager.php
+++ b/src/Illuminate/Log/LogManager.php
@@ -213,7 +213,9 @@ protected function callCustomCreator(array $config)
      */
     protected function createCustomDriver(array $config)
     {
-        return $this->app->make($config['via'])->__invoke($config);
+        $f = is_callable($via = $config['via']) ? $via : $this->app->make($via);
+
+        return $f($config);
     }
 
     /**