diff --git a/src/gen_stub.php b/src/gen_stub.php
index 5b19f312..125785cd 100755
--- a/src/gen_stub.php
+++ b/src/gen_stub.php
@@ -3125,9 +3125,6 @@ class StringBuilder {
         "false" => "ZEND_STR_FALSE",
         "null" => "ZEND_STR_NULL_LOWERCASE",
         "mixed" => "ZEND_STR_MIXED",
-        "any" => "ZEND_STR_MIXED",
-        "box" => "ZEND_STR_MIXED",
-        "stream" => "ZEND_STR_MIXED",
     ];
 
     // NEW in 8.1
diff --git a/tests/compiler/attribute/pseudo-type-string-metadata.phpt b/tests/compiler/attribute/pseudo-type-string-metadata.phpt
new file mode 100644
index 00000000..235c9b73
--- /dev/null
+++ b/tests/compiler/attribute/pseudo-type-string-metadata.phpt
@@ -0,0 +1,42 @@
+--TEST--
+attribute strings must not be rewritten through pseudo-type aliases
+--FILE--
+<?php
+
+#[Attribute(Attribute::TARGET_CLASS)]
+final class StringMetadata
+{
+    public function __construct(
+        public string $stream,
+        public string $any,
+        public string $box,
+    ) {
+    }
+}
+
+#[StringMetadata(stream: 'stream', any: 'any', box: 'box')]
+final class AttributedClass
+{
+}
+
+function main(): void
+{
+    $attribute = (new ReflectionClass(AttributedClass::class))->getAttributes()[0];
+    var_dump($attribute->getArguments());
+
+    $metadata = $attribute->newInstance();
+    var_dump($metadata->stream, $metadata->any, $metadata->box);
+}
+?>
+--EXPECT--
+array(3) {
+  ["stream"]=>
+  string(6) "stream"
+  ["any"]=>
+  string(3) "any"
+  ["box"]=>
+  string(3) "box"
+}
+string(6) "stream"
+string(3) "any"
+string(3) "box"
diff --git a/tests/compiler/object_property/property-known-string-names.phpt b/tests/compiler/object_property/property-known-string-names.phpt
new file mode 100644
index 00000000..339ddb4f
--- /dev/null
+++ b/tests/compiler/object_property/property-known-string-names.phpt
@@ -0,0 +1,101 @@
+--TEST--
+property names must not be rewritten through pseudo-type string aliases
+--FILE--
+<?php
+
+final class KnownStringProperties
+{
+    private mixed $mixed = 'mixed';
+    private mixed $stream = 'initial-stream';
+    private mixed $any = 'initial-any';
+    private mixed $box = 'initial-box';
+    private mixed $int = 42;
+    private mixed $string = 'string';
+    private mixed $handleStream = 'camel-case';
+
+    public function update(): void
+    {
+        $this->stream = 'updated-stream';
+        $this->any = 'updated-any';
+        $this->box = 'updated-box';
+    }
+
+    public function values(): array
+    {
+        return [
+            $this->mixed,
+            $this->stream,
+            $this->any,
+            $this->box,
+            $this->int,
+            $this->string,
+            $this->handleStream,
+        ];
+    }
+}
+
+function main(): void
+{
+    $object = new KnownStringProperties();
+    var_dump($object->values());
+    $object->update();
+    var_dump($object->values());
+
+    $reflection = new ReflectionClass(KnownStringProperties::class);
+    $names = array_map(
+        static fn (ReflectionProperty $property): string => $property->getName(),
+        $reflection->getProperties(),
+    );
+    sort($names);
+    var_dump($names);
+}
+?>
+--EXPECT--
+array(7) {
+  [0]=>
+  string(5) "mixed"
+  [1]=>
+  string(14) "initial-stream"
+  [2]=>
+  string(11) "initial-any"
+  [3]=>
+  string(11) "initial-box"
+  [4]=>
+  int(42)
+  [5]=>
+  string(6) "string"
+  [6]=>
+  string(10) "camel-case"
+}
+array(7) {
+  [0]=>
+  string(5) "mixed"
+  [1]=>
+  string(14) "updated-stream"
+  [2]=>
+  string(11) "updated-any"
+  [3]=>
+  string(11) "updated-box"
+  [4]=>
+  int(42)
+  [5]=>
+  string(6) "string"
+  [6]=>
+  string(10) "camel-case"
+}
+array(7) {
+  [0]=>
+  string(3) "any"
+  [1]=>
+  string(3) "box"
+  [2]=>
+  string(12) "handleStream"
+  [3]=>
+  string(3) "int"
+  [4]=>
+  string(5) "mixed"
+  [5]=>
+  string(6) "stream"
+  [6]=>
+  string(6) "string"
+}