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
 {
 }
diff --git a/stubs/PhpCsFixer/Fixer/FixerInterface.php b/stubs/PhpCsFixer/Fixer/FixerInterface.php
new file mode 100644
index 00000000..9f408aa2
--- /dev/null
+++ b/stubs/PhpCsFixer/Fixer/FixerInterface.php
@@ -0,0 +1,14 @@
+<?php
+
+namespace PhpCsFixer\Fixer;
+
+use PhpCsFixer\FixerDefinitionInterface;
+use PhpCsFixer\Tokens;
+
+if (class_exists('PhpCsFixer\FixerInterface')) {
+    return;
+}
+
+interface FixerInterface
+{
+}