diff --git a/src/Illuminate/Foundation/Console/ListenerMakeCommand.php b/src/Illuminate/Foundation/Console/ListenerMakeCommand.php
index 6d815bbd7d31..6e549fd6d042 100644
--- a/src/Illuminate/Foundation/Console/ListenerMakeCommand.php
+++ b/src/Illuminate/Foundation/Console/ListenerMakeCommand.php
@@ -44,7 +44,7 @@ class ListenerMakeCommand extends GeneratorCommand
      */
     protected function buildClass($name)
     {
-        $event = $this->option('event');
+        $event = $this->option('event') ?? '';
 
         if (! Str::startsWith($event, [
             $this->laravel->getNamespace(),