diff --git a/src/libs/3rdparty/modeling/qtserialization/inc/qark/impl/savingrefmap.h b/src/libs/3rdparty/modeling/qtserialization/inc/qark/impl/savingrefmap.h
index 3bd480c3e71..efa6563b8e2 100644
--- a/src/libs/3rdparty/modeling/qtserialization/inc/qark/impl/savingrefmap.h
+++ b/src/libs/3rdparty/modeling/qtserialization/inc/qark/impl/savingrefmap.h
@@ -43,12 +43,6 @@ namespace impl {
 class SavingRefMap
 {
 public:
-    SavingRefMap()
-        : m_references(),
-          m_nextRef(1)
-    {
-    }
-
     template<typename T>
     bool hasRef(const T *object)
     {
@@ -79,7 +73,7 @@ private:
     typedef QMap<KeyType, ValueType> MapType;
 
     MapType m_references;
-    ObjectId m_nextRef;
+    ObjectId m_nextRef = ObjectId(1);
 };
 
 } // namespace impl
diff --git a/src/libs/3rdparty/modeling/qtserialization/inc/qark/qxmlinarchive.h b/src/libs/3rdparty/modeling/qtserialization/inc/qark/qxmlinarchive.h
index a36696f8fac..71f76df7f9e 100644
--- a/src/libs/3rdparty/modeling/qtserialization/inc/qark/qxmlinarchive.h
+++ b/src/libs/3rdparty/modeling/qtserialization/inc/qark/qxmlinarchive.h
@@ -551,9 +551,8 @@ private:
     class XmlTag
     {
     public:
-        XmlTag() : m_isEndTag(false) { }
         QString m_tagName;
-        bool m_isEndTag;
+        bool m_isEndTag = false;
         impl::ObjectId m_id;
         QHash<QString, QString> m_attributes;
     };