diff --git a/resources/dav/resource/urlconfigurationdialog.cpp b/resources/dav/resource/urlconfigurationdialog.cpp
--- a/resources/dav/resource/urlconfigurationdialog.cpp
+++ b/resources/dav/resource/urlconfigurationdialog.cpp
@@ -26,6 +26,7 @@
 #include <kmessagebox.h>
 #include <KLocalizedString>
 
+#include <QButtonGroup>
 #include <QStandardItem>
 #include <QStandardItemModel>
 #include <QVBoxLayout>
diff --git a/resources/kalarm/shared/alarmtyperadiowidget.cpp b/resources/kalarm/shared/alarmtyperadiowidget.cpp
--- a/resources/kalarm/shared/alarmtyperadiowidget.cpp
+++ b/resources/kalarm/shared/alarmtyperadiowidget.cpp
@@ -21,6 +21,8 @@
 
 #include "alarmtyperadiowidget.h"
 
+#include <QButtonGroup>
+
 AlarmTypeRadioWidget::AlarmTypeRadioWidget(QWidget *parent)
     : Akonadi::SingleFileValidatingWidget(parent)
 {
diff --git a/resources/pop3/accountdialog.cpp b/resources/pop3/accountdialog.cpp
--- a/resources/pop3/accountdialog.cpp
+++ b/resources/pop3/accountdialog.cpp
@@ -41,6 +41,8 @@
 #include <KWindowSystem>
 #include <kwallet.h>
 #include "pop3resource_debug.h"
+
+#include <QButtonGroup>
 #include <QDialogButtonBox>
 #include <QPushButton>
 #include <QVBoxLayout>
diff --git a/resources/shared/singlefileresource/singlefileresourceconfigdialogbase.cpp b/resources/shared/singlefileresource/singlefileresourceconfigdialogbase.cpp
--- a/resources/shared/singlefileresource/singlefileresourceconfigdialogbase.cpp
+++ b/resources/shared/singlefileresource/singlefileresourceconfigdialogbase.cpp
@@ -32,6 +32,7 @@
 #include <QDialogButtonBox>
 #include <KConfigGroup>
 #include <QPushButton>
+#include <QTabBar>
 #include <QVBoxLayout>
 
 using namespace Akonadi;