diff --git a/ext/dom/php_dom.stub.php b/ext/dom/php_dom.stub.php
index acd50792078..587694f5dfa 100644
--- a/ext/dom/php_dom.stub.php
+++ b/ext/dom/php_dom.stub.php
@@ -1234,7 +1234,7 @@ namespace
     }
 #endif
 
-    function dom_import_simplexml(object $node): DOMElement {}
+    function dom_import_simplexml(object $node): DOMAttr|DOMElement {}
 }
 
 namespace Dom
@@ -2171,5 +2171,5 @@ namespace Dom
     }
 #endif
 
-    function import_simplexml(object $node): Element {}
+    function import_simplexml(object $node): Attr|Element {}
 }
diff --git a/ext/dom/php_dom_arginfo.h b/ext/dom/php_dom_arginfo.h
index 389af32f386..3d6f093eb22 100644
--- a/ext/dom/php_dom_arginfo.h
+++ b/ext/dom/php_dom_arginfo.h
@@ -1,11 +1,11 @@
 /* This is a generated file, edit the .stub.php file instead.
- * Stub hash: bc53676bcd060f8fd26ff6e92da4983e85c0eb83 */
+ * Stub hash: 20c13a727cffb452475989a743ec29a8412a52f1 */
 
-ZEND_BEGIN_ARG_WITH_RETURN_OBJ_INFO_EX(arginfo_dom_import_simplexml, 0, 1, DOMElement, 0)
+ZEND_BEGIN_ARG_WITH_RETURN_OBJ_TYPE_MASK_EX(arginfo_dom_import_simplexml, 0, 1, DOMAttr|DOMElement, 0)
 	ZEND_ARG_TYPE_INFO(0, node, IS_OBJECT, 0)
 ZEND_END_ARG_INFO()
 
-ZEND_BEGIN_ARG_WITH_RETURN_OBJ_INFO_EX(arginfo_Dom_import_simplexml, 0, 1, Dom\\Element, 0)
+ZEND_BEGIN_ARG_WITH_RETURN_OBJ_TYPE_MASK_EX(arginfo_Dom_import_simplexml, 0, 1, Dom\\Attr|Dom\\Element, 0)
 	ZEND_ARG_TYPE_INFO(0, node, IS_OBJECT, 0)
 ZEND_END_ARG_INFO()
 
diff --git a/ext/dom/tests/gh16473.phpt b/ext/dom/tests/gh16473.phpt
new file mode 100644
index 00000000000..f4f7308ca90
--- /dev/null
+++ b/ext/dom/tests/gh16473.phpt
@@ -0,0 +1,13 @@
+--TEST--
+GH-16473 (dom_import_simplexml stub is wrong)
+--EXTENSIONS--
+dom
+simplexml
+--FILE--
+<?php
+$root = simplexml_load_string('<root xmlns:x="urn:x" x:attr="foo"/>');
+$attr = $root->attributes('urn:x');
+var_dump(dom_import_simplexml($attr)->textContent);
+?>
+--EXPECT--
+string(3) "foo"