diff --git a/src/plugins/platforms/xcb/qxcbclipboard.h b/src/plugins/platforms/xcb/qxcbclipboard.h
index a33f43c4353..82c1d5653c3 100644
--- a/src/plugins/platforms/xcb/qxcbclipboard.h
+++ b/src/plugins/platforms/xcb/qxcbclipboard.h
@@ -45,7 +45,8 @@
 #include <xcb/xcb.h>
 #include <xcb/xfixes.h>
 
-#include <QtCore/QObject>
+#include <QtCore/qobject.h>
+#include <QtCore/qmap.h>
 
 QT_BEGIN_NAMESPACE
 
diff --git a/src/plugins/platforms/xcb/qxcbsessionmanager.cpp b/src/plugins/platforms/xcb/qxcbsessionmanager.cpp
index 3e0756b0e43..acdd5b4a902 100644
--- a/src/plugins/platforms/xcb/qxcbsessionmanager.cpp
+++ b/src/plugins/platforms/xcb/qxcbsessionmanager.cpp
@@ -42,6 +42,7 @@
 
 #ifndef QT_NO_SESSIONMANAGER
 
+#include <QtCore/qvarlengtharray.h>
 #include <qpa/qwindowsysteminterface.h>
 
 #include <qguiapplication.h>