diff --git a/src/Php/CompilerBase.php b/src/Php/CompilerBase.php
index cd16c9fc..492bbb0b 100644
--- a/src/Php/CompilerBase.php
+++ b/src/Php/CompilerBase.php
@@ -3270,11 +3270,13 @@ class CompilerBase extends \PhpAot\Core\Translator
         }
 
         if ($argInfo->type === self::TYPE_OBJECT) {
-            $object = $this->parseVariable($arg->value);
-            if ($this->isVarExpr($arg->value) and $this->isTypedObject($object)) {
-                $class = $this->getObjectType($object);
-                if ($argInfo->class and $class != $argInfo->class) {
-                    $this->fatalError($arg, "Argument `{$argInfo->name}` must be an instance of `{$argInfo->class}`, `{$class}` given");
+            if ($this->isVarExpr($arg->value)) {
+                $object = $this->parseVariable($arg->value);
+                if ($this->isTypedObject($object)) {
+                    $class = $this->getObjectType($object);
+                    if ($argInfo->class and $class != $argInfo->class) {
+                        $this->fatalError($arg, "Argument `{$argInfo->name}` must be an instance of `{$argInfo->class}`, `{$class}` given");
+                    }
                 }
             }
             return $this->convertObjectExpr($expr);
diff --git a/src/Php/Reflection.php b/src/Php/Reflection.php
index 2158e8ac..833c3213 100644
--- a/src/Php/Reflection.php
+++ b/src/Php/Reflection.php
@@ -95,6 +95,21 @@ class Reflection
         return $args[$index];
     }
 
+    public static function getClassMethodModifiers(string $className, string $fn): ?int
+    {
+        $classRef = self::getClass($className);
+        if (!$classRef) {
+            return null;
+        }
+
+        try {
+            $method = $classRef->getMethod($fn);
+            return $method->getModifiers();
+        } catch (\ReflectionException $e) {
+            return null;
+        }
+    }
+
     public static function getClassMethodParameter(string $className, string $fn, int $index): ?\ReflectionParameter
     {
         $classRef = self::getClass($className);
diff --git a/src/Php/Translator.php b/src/Php/Translator.php
index f6995ac3..e0ec0874 100644
--- a/src/Php/Translator.php
+++ b/src/Php/Translator.php
@@ -1200,10 +1200,18 @@ class Translator extends Preprocessor
             if (!$extends) {
                 break;
             }
+            // 父类是内置类
+            if ($classDef->inheritedFromInternalClass) {
+                if (Reflection::getClassMethodModifiers($extends, $name) & \ReflectionMethod::IS_PRIVATE) {
+                    goto _error;
+                }
+                break;
+            }
             $classDef = $this->getClass($extends);
             if ($classDef->hasMethod($this->method)) {
                 $methodDef = $classDef->getMethod($this->method);
                 if ($methodDef->flags & Modifiers::PRIVATE) {
+                    _error:
                     $this->fatalError($v,
                         'Cannot override private method `' .
                         $classDef->getNamespacedName(false) . '::' . $this->method . '()`');