diff --git a/src/Php/CompilerBase.php b/src/Php/CompilerBase.php
index 044eaf14..13a3e17c 100644
--- a/src/Php/CompilerBase.php
+++ b/src/Php/CompilerBase.php
@@ -2713,10 +2713,6 @@ class CompilerBase extends \PhpAot\Core\Translator
         }
         $class = '';
         $type = $this->parseTypeDecl($param->type, self::DECL_TYPE_OF_PARAM, $class);
-        // stream/box 是伪类型，实际运行时依然作为 var 处理
-        if ($type === self::TYPE_STREAM || $type === self::TYPE_BOX) {
-            $type = self::TYPE_VAR;
-        }
         if ($class and !$this->hasInterface($class) and !$this->isAbstractClass($class)) {
             $argInfo->class = $class;
         }
diff --git a/src/Php/Preprocessor.php b/src/Php/Preprocessor.php
index ea60e5d1..51aa1e27 100644
--- a/src/Php/Preprocessor.php
+++ b/src/Php/Preprocessor.php
@@ -63,7 +63,11 @@ class Preprocessor extends CompilerBase
 
     protected function genArgumentDeclaration(ArgInfo $argInfo): string
     {
-        return $argInfo->type . ' ' . $argInfo->name;
+        $type = $argInfo->type;
+        if ($type === self::TYPE_STREAM || $type === self::TYPE_BOX) {
+            $type = self::TYPE_VAR;
+        }
+        return $type . ' ' . $argInfo->name;
     }
 
     public function getCppFile(string $file): string
diff --git a/src/Php/Translator.php b/src/Php/Translator.php
index 2b73679a..7a0e1c86 100644
--- a/src/Php/Translator.php
+++ b/src/Php/Translator.php
@@ -1948,8 +1948,9 @@ CODE;
                         $argExpr = 'php::getCallArg(' . $k . ')';
                     }
                 }
+                $cppType = ($argInfo->type === self::TYPE_STREAM || $argInfo->type === self::TYPE_BOX) ? self::TYPE_VAR : $argInfo->type;
                 $expr = $this->convertExprFromType($argInfo->type, $argExpr);
-                $cppCode .= $this->getIndent() . $argInfo->type . ' ' . $var . ' = ' . $expr . ';' . PHP_EOL;
+                $cppCode .= $this->getIndent() . $cppType . ' ' . $var . ' = ' . $expr . ';' . PHP_EOL;
             }
             $callParams .= 'arg_' . $argInfo->name . ',';
         }
diff --git a/src/Php/UniversalMethodCall.php b/src/Php/UniversalMethodCall.php
index 0b31c9d5..53fa712d 100644
--- a/src/Php/UniversalMethodCall.php
+++ b/src/Php/UniversalMethodCall.php
@@ -474,9 +474,9 @@ trait UniversalMethodCall
             return false;
         }
         $firstParam = $funcDef->argInfoList[0];
-        // Stream is a PHP pseudo-type; its params are always untyped (TYPE_VAR) or references
-        if ($type === self::TYPE_STREAM) {
-            return $firstParam->byRef || $firstParam->type === self::TYPE_VAR || $firstParam->type === self::TYPE_REF;
+        // Stream/Box are PHP pseudo-types; their params may be typed or untyped
+        if ($type === self::TYPE_STREAM || $type === self::TYPE_BOX) {
+            return $firstParam->byRef || $firstParam->type === self::TYPE_VAR || $firstParam->type === self::TYPE_REF || $firstParam->type === $type;
         }
         if ($firstParam->byRef) {
             return $type === self::TYPE_ARRAY;
diff --git a/tests/aot/var_convert/002.phpt b/tests/aot/var_convert/002.phpt
new file mode 100644
index 00000000..4fcee25e
--- /dev/null
+++ b/tests/aot/var_convert/002.phpt
@@ -0,0 +1,21 @@
+--TEST--
+var convert chained on array element
+--FILE--
+<?php
+function stream_write_test(stream $stream) {
+    $stream->write('world');
+}
+
+function main()
+{
+    $pair = stream_socket_pair(AF_UNIX, SOCK_STREAM, 0);
+    $pair[0]->toStream()->write('hello');
+    var_dump($pair[1]->toStream()->read(5));
+
+    $pair[0]->toStream()->writeTest();
+    var_dump($pair[1]->toStream()->read(5));
+}
+?>
+--EXPECT--
+string(5) "hello"
+string(5) "world"