diff --git a/rules/DowngradePhp71/TypeDeclaration/PhpDocFromTypeDeclarationDecorator.php b/rules/DowngradePhp71/TypeDeclaration/PhpDocFromTypeDeclarationDecorator.php
index 5189fcdd132..e6766e9972d 100644
--- a/rules/DowngradePhp71/TypeDeclaration/PhpDocFromTypeDeclarationDecorator.php
+++ b/rules/DowngradePhp71/TypeDeclaration/PhpDocFromTypeDeclarationDecorator.php
@@ -127,12 +127,6 @@ private function moveParamTypeToParamDoc(
      */
     private function isMatchingType(Type $type, array $requiredTypes): bool
     {
-        foreach ($requiredTypes as $requiredType) {
-            if (is_a($type, $requiredType, true)) {
-                return true;
-            }
-        }
-
-        return false;
+        return in_array($type::class, $requiredTypes, true);
     }
 }