diff --git a/config/set/php85.php b/config/set/php85.php
index be4cad3a560..25951a3e5c7 100644
--- a/config/set/php85.php
+++ b/config/set/php85.php
@@ -18,6 +18,7 @@
 use Rector\Removing\ValueObject\RemoveFuncCallArg;
 use Rector\Renaming\Rector\Cast\RenameCastRector;
 use Rector\Renaming\Rector\ClassConstFetch\RenameClassConstFetchRector;
+use Rector\Renaming\Rector\ConstFetch\RenameConstantRector;
 use Rector\Renaming\Rector\FuncCall\RenameFunctionRector;
 use Rector\Renaming\Rector\MethodCall\RenameMethodRector;
 use Rector\Renaming\ValueObject\MethodCallRename;
@@ -200,4 +201,12 @@
             new WrapFuncCallWithPhpVersionIdChecker('xml_parser_free', 80500),
         ]
     );
+
+    // https://wiki.php.net/rfc/deprecations_php_8_5#deprecate_filter_default_constant
+    $rectorConfig->ruleWithConfiguration(
+        RenameConstantRector::class,
+        [
+            'FILTER_DEFAULT' => 'FILTER_UNSAFE_RAW',
+        ]
+    );
 };