diff --git a/src/Traits/TenantManagerEvents.php b/src/Traits/TenantManagerEvents.php
index b4cb7455..416ebd72 100644
--- a/src/Traits/TenantManagerEvents.php
+++ b/src/Traits/TenantManagerEvents.php
@@ -79,7 +79,7 @@ trait TenantManagerEvents
     public function event(string $name): Collection
     {
         return array_reduce($this->listeners[$name], function ($prevents, $listener) {
-            return $prevents->merge($listener($this));
+            return $prevents->merge($listener($this) ?? []);
         }, collect([]));
     }
 }