diff --git a/build/target-repository/composer.json b/build/target-repository/composer.json
index ee615ac1..47d4369a 100644
--- a/build/target-repository/composer.json
+++ b/build/target-repository/composer.json
@@ -7,5 +7,10 @@
     },
     "bin": [
         "bin/rule-doc-generator"
-    ]
+    ],
+    "autoload": {
+        "classmap": [
+            "stubs"
+        ]
+    }
 }
diff --git a/scoper.php b/scoper.php
index 536c0ae4..841e45f0 100644
--- a/scoper.php
+++ b/scoper.php
@@ -22,5 +22,5 @@
         'stubs/Rector/Core/Contract/Rector/RectorInterface.php',
     ],
 
-    // @todo unprefix class names?
+
 ];
diff --git a/stubs/PHPStan/Rules/Rule.php b/stubs/PHPStan/Rules/Rule.php
new file mode 100644
index 00000000..b63ce1f8
--- /dev/null
+++ b/stubs/PHPStan/Rules/Rule.php
@@ -0,0 +1,12 @@
+<?php
+
+namespace PHPStan\Rules;
+
+// if exists
+if (interface_exists(Rule::class)) {
+    return;
+}
+
+interface Rule
+{
+}