diff --git a/Zend/zend_types.h b/Zend/zend_types.h
index c0efe2a6dcf..6f7fef32a0e 100644
--- a/Zend/zend_types.h
+++ b/Zend/zend_types.h
@@ -273,6 +273,9 @@ typedef struct {
 #define ZEND_TYPE_INIT_PTR_MASK(ptr, type_mask) \
 	{ (void *) (ptr), (type_mask) }
 
+#define ZEND_TYPE_INIT_UNION(ptr, extra_flags) \
+	{ (void *) (ptr), (_ZEND_TYPE_LIST_BIT|_ZEND_TYPE_UNION_BIT) | (extra_flags) }
+
 #define ZEND_TYPE_INIT_CLASS(class_name, allow_null, extra_flags) \
 	ZEND_TYPE_INIT_PTR(class_name, _ZEND_TYPE_NAME_BIT, allow_null, extra_flags)
 
diff --git a/build/gen_stub.php b/build/gen_stub.php
index 30b0b2fccd9..ecbad1eb194 100755
--- a/build/gen_stub.php
+++ b/build/gen_stub.php
@@ -1460,7 +1460,7 @@ class PropertyInfo
 
                     $typeMaskCode = $this->type->toArginfoType()->toTypeMask();
 
-                    $code .= "\tzend_type property_{$propertyName}_type = ZEND_TYPE_INIT_PTR(property_{$propertyName}_type_list, _ZEND_TYPE_LIST_BIT, 0, $typeMaskCode);\n";
+                    $code .= "\tzend_type property_{$propertyName}_type = ZEND_TYPE_INIT_UNION(property_{$propertyName}_type_list, $typeMaskCode);\n";
                     $typeCode = "property_{$propertyName}_type";
                 } else {
                     $escapedClassName = $arginfoType->classTypes[0]->toEscapedName();
diff --git a/ext/reflection/tests/internal_property_union_type.phpt b/ext/reflection/tests/internal_property_union_type.phpt
new file mode 100644
index 00000000000..b70c98f56f3
--- /dev/null
+++ b/ext/reflection/tests/internal_property_union_type.phpt
@@ -0,0 +1,12 @@
+--TEST--
+Union type on internal property
+--EXTENSIONS--
+zend_test
+--FILE--
+<?php
+$rp = new ReflectionProperty(_ZendTestClass::class, 'classUnionProp');
+$rt = $rp->getType();
+echo $rt, "\n";
+?>
+--EXPECT--
+stdClass|Iterator|null
diff --git a/ext/reflection/tests/internal_static_property.phpt b/ext/reflection/tests/internal_static_property.phpt
index 79ba666720a..bf4294d8dec 100644
--- a/ext/reflection/tests/internal_static_property.phpt
+++ b/ext/reflection/tests/internal_static_property.phpt
@@ -1,9 +1,7 @@
 --TEST--
 ReflectionProperty::get/setValue() on internal static property
---SKIPIF--
-<?php
-if (!class_exists('_ZendTestClass')) die('skip zend_test extension required');
-?>
+--EXTENSIONS--
+zend_test
 --FILE--
 <?php
 
diff --git a/ext/zend_test/test_arginfo.h b/ext/zend_test/test_arginfo.h
index 21de886d8bf..19cf8ffbd25 100644
--- a/ext/zend_test/test_arginfo.h
+++ b/ext/zend_test/test_arginfo.h
@@ -260,7 +260,7 @@ static zend_class_entry *register_class__ZendTestClass(zend_class_entry *class_e
 	property_classUnionProp_type_list->num_types = 2;
 	property_classUnionProp_type_list->types[0] = (zend_type) ZEND_TYPE_INIT_CLASS(property_classUnionProp_class_stdClass, 0, 0);
 	property_classUnionProp_type_list->types[1] = (zend_type) ZEND_TYPE_INIT_CLASS(property_classUnionProp_class_Iterator, 0, 0);
-	zend_type property_classUnionProp_type = ZEND_TYPE_INIT_PTR(property_classUnionProp_type_list, _ZEND_TYPE_LIST_BIT, 0, MAY_BE_NULL);
+	zend_type property_classUnionProp_type = ZEND_TYPE_INIT_UNION(property_classUnionProp_type_list, MAY_BE_NULL);
 	zval property_classUnionProp_default_value;
 	ZVAL_NULL(&property_classUnionProp_default_value);
 	zend_string *property_classUnionProp_name = zend_string_init("classUnionProp", sizeof("classUnionProp") - 1, 1);