diff --git a/bin/rector.php b/bin/rector.php
index cc6bf5dc2d5..ae91f222b06 100755
--- a/bin/rector.php
+++ b/bin/rector.php
@@ -121,6 +121,11 @@ public function loadIfExistsAndNotLoadedYet(string $filePath): void
     require_once __DIR__ . '/../preload.php';
 }
 
+// require rector-src on split packages
+if (file_exists(__DIR__ . '/../preload-split-package.php') && is_dir(__DIR__ . '/../../../../vendor')) {
+    require_once __DIR__ . '/../preload-split-package.php';
+}
+
 require_once __DIR__ . '/../src/constants.php';
 
 $autoloadIncluder->loadIfExistsAndNotLoadedYet(__DIR__ . '/../vendor/scoper-autoload.php');