diff --git a/src/TenancyServiceProvider.php b/src/TenancyServiceProvider.php
index 58ae70f2..946f114f 100644
--- a/src/TenancyServiceProvider.php
+++ b/src/TenancyServiceProvider.php
@@ -54,7 +54,9 @@ class TenancyServiceProvider extends ServiceProvider
         }
 
         // Bind the class in the tenancy.id_generator config to the UniqueIdentifierGenerator abstract.
-        $this->app->bind(Contracts\UniqueIdentifierGenerator::class, $this->app['config']['tenancy.id_generator']);
+        if (! is_null($this->app['config']['tenancy.id_generator'])) {
+            $this->app->bind(Contracts\UniqueIdentifierGenerator::class, $this->app['config']['tenancy.id_generator']);
+        }
 
         $this->app->singleton(Commands\Migrate::class, function ($app) {
             return new Commands\Migrate($app['migrator'], $app['events']);