diff --git a/src/AutoHideDockContainer.h b/src/AutoHideDockContainer.h
index a483e68..2fdce37 100644
--- a/src/AutoHideDockContainer.h
+++ b/src/AutoHideDockContainer.h
@@ -34,7 +34,7 @@
 #include <QSplitter>
 #include "AutoHideTab.h"
 
-class QXmlStreamWriter;
+QT_FORWARD_DECLARE_CLASS(QXmlStreamWriter)
 
 namespace ads
 {
diff --git a/src/AutoHideSideBar.h b/src/AutoHideSideBar.h
index a7e4835..3505682 100644
--- a/src/AutoHideSideBar.h
+++ b/src/AutoHideSideBar.h
@@ -33,7 +33,7 @@
 #include "ads_globals.h"
 #include "AutoHideTab.h"
 
-class QXmlStreamWriter;
+QT_FORWARD_DECLARE_CLASS(QXmlStreamWriter)
 
 namespace ads
 {