diff --git a/reference/reflection/reflectionclass/isinstantiable.xml b/reference/reflection/reflectionclass/isinstantiable.xml
index 2ed4754ba7..18ba5dd552 100644
--- a/reference/reflection/reflectionclass/isinstantiable.xml
+++ b/reference/reflection/reflectionclass/isinstantiable.xml
@@ -60,7 +60,18 @@ class D extends abstractClass {
     function f2() { }
 }
 
-$classes = array("C", "iface", "ifaceImpl", "abstractClass", "D");
+class privateConstructor {
+    private function __construct() { }
+}
+
+$classes = array(
+    "C",
+    "iface",
+    "ifaceImpl",
+    "abstractClass",
+    "D",
+    "privateConstructor",
+);
 
 foreach($classes  as $class ) {
     $reflectionClass = new ReflectionClass($class);