diff --git a/stubs/PhpCsFixer/AbstractFixer.php b/stubs/PhpCsFixer/AbstractFixer.php
index 5d55de72..d16898eb 100644
--- a/stubs/PhpCsFixer/AbstractFixer.php
+++ b/stubs/PhpCsFixer/AbstractFixer.php
@@ -6,6 +6,8 @@
     return;
 }
 
-abstract class AbstractFixer
+use PhpCsFixer\Fixer\FixerInterface;
+
+abstract class AbstractFixer implements FixerInterface
 {
 }