diff --git a/lib/PhpParser/Unserializer/XML.php b/lib/PhpParser/Unserializer/XML.php
index b3bf56f..79b4658 100644
--- a/lib/PhpParser/Unserializer/XML.php
+++ b/lib/PhpParser/Unserializer/XML.php
@@ -49,9 +49,8 @@ class XML implements Unserializer
         }
     }
 
-    protected function readNode()
-    {
-        $className = 'PHPParser_Node_' . $this->reader->localName;
+    protected function readNode() {
+        $className = $this->getClassNameFromType($this->reader->localName);
 
         // create the node without calling it's constructor
         $node = unserialize(
@@ -136,4 +135,12 @@ class XML implements Unserializer
             $this->reader->getAttribute('line')
         );
     }
+
+    protected function getClassNameFromType($type) {
+        $className = 'PhpParser\\Node\\' . strtr($type, '_', '\\');
+        if (!class_exists($className)) {
+            $className .= '_';
+        }
+        return $className;
+    }
 }
diff --git a/test/PhpParser/Unserializer/XMLTest.php b/test/PhpParser/Unserializer/XMLTest.php
index d23a120..52b082d 100644
--- a/test/PhpParser/Unserializer/XMLTest.php
+++ b/test/PhpParser/Unserializer/XMLTest.php
@@ -46,7 +46,7 @@ XML;
         $xml = <<<XML
 <?xml version="1.0" encoding="UTF-8"?>
 <AST xmlns:node="http://nikic.github.com/PHPParser/XML/node">
- <node:Scalar_ClassConst />
+ <node:Scalar_MagicConst_Class />
 </AST>
 XML;