diff --git a/dataengines/geolocation/geolocation.cpp b/dataengines/geolocation/geolocation.cpp
index 642d81b39..6a36c3bd0 100644
--- a/dataengines/geolocation/geolocation.cpp
+++ b/dataengines/geolocation/geolocation.cpp
@@ -11,7 +11,6 @@
 #include <KPluginMetaData>
 #include <NetworkManagerQt/Manager>
 #include <QDebug>
-#include <QNetworkConfigurationManager>
 
 static const char SOURCE[] = "location";
 
diff --git a/gmenu-dbusmenu-proxy/actions.h b/gmenu-dbusmenu-proxy/actions.h
index dea854ab6..e93d4a9a7 100644
--- a/gmenu-dbusmenu-proxy/actions.h
+++ b/gmenu-dbusmenu-proxy/actions.h
@@ -8,11 +8,10 @@
 
 #include <QObject>
 #include <QString>
+#include <QStringList>
 
 #include "gdbusmenutypes_p.h"
 
-class QStringList;
-
 class Actions : public QObject
 {
     Q_OBJECT
diff --git a/interactiveconsole/interactiveconsole.cpp b/interactiveconsole/interactiveconsole.cpp
index 14a6698e5..b78481d56 100644
--- a/interactiveconsole/interactiveconsole.cpp
+++ b/interactiveconsole/interactiveconsole.cpp
@@ -8,6 +8,7 @@
 #include "interactiveconsole.h"
 
 #include <QAction>
+#include <QActionGroup>
 #include <QApplication>
 #include <QDBusConnection>
 #include <QDBusMessage>
diff --git a/kcms/style/gtkthemesmodel.h b/kcms/style/gtkthemesmodel.h
index 9027c8e9a..a147bb3e9 100644
--- a/kcms/style/gtkthemesmodel.h
+++ b/kcms/style/gtkthemesmodel.h
@@ -8,8 +8,8 @@
 
 #include <QAbstractListModel>
 #include <QMap>
+#include <QStringList>
 
-class QStringList;
 class QString;
 
 class GtkThemesModel : public QAbstractListModel
diff --git a/klipper/historyimageitem.cpp b/klipper/historyimageitem.cpp
index 67e8a3470..accc342e5 100644
--- a/klipper/historyimageitem.cpp
+++ b/klipper/historyimageitem.cpp
@@ -9,6 +9,7 @@
 #include "historymodel.h"
 
 #include <QCryptographicHash>
+#include <QIODevice>
 #include <QIcon>
 #include <QMimeData>
 
diff --git a/klipper/historyurlitem.cpp b/klipper/historyurlitem.cpp
index 61ed27e6b..72fae1f50 100644
--- a/klipper/historyurlitem.cpp
+++ b/klipper/historyurlitem.cpp
@@ -6,6 +6,7 @@
 #include "historyurlitem.h"
 
 #include <QCryptographicHash>
+#include <QIODevice>
 #include <QMimeData>
 
 namespace
diff --git a/klipper/klipperpopup.cpp b/klipper/klipperpopup.cpp
index 6ecc969ea..eefaa70db 100644
--- a/klipper/klipperpopup.cpp
+++ b/klipper/klipperpopup.cpp
@@ -9,7 +9,6 @@
 
 #include "klipper_debug.h"
 #include <QApplication>
-#include <QDesktopWidget>
 #include <QKeyEvent>
 #include <QScreen>
 #include <QWidgetAction>
diff --git a/ksmserver/main.cpp b/ksmserver/main.cpp
index 7d9a2b375..9afdc0797 100644
--- a/ksmserver/main.cpp
+++ b/ksmserver/main.cpp
@@ -30,6 +30,7 @@
 
 #include <QApplication>
 #include <QCommandLineParser>
+#include <QFile>
 #include <QQuickWindow>
 #include <X11/extensions/Xrender.h>
 
diff --git a/ksplash/ksplashqml/main.cpp b/ksplash/ksplashqml/main.cpp
index d2b083d80..ebc894f47 100644
--- a/ksplash/ksplashqml/main.cpp
+++ b/ksplash/ksplashqml/main.cpp
@@ -7,6 +7,7 @@
 #include "splashapp.h"
 #include <QQuickWindow>
 
+#include <QFile>
 #include <QTextStream>
 
 #include <kworkspace.h>
diff --git a/libdbusmenuqt/dbusmenuimporter.cpp b/libdbusmenuqt/dbusmenuimporter.cpp
index 229263745..1473b2d5f 100644
--- a/libdbusmenuqt/dbusmenuimporter.cpp
+++ b/libdbusmenuqt/dbusmenuimporter.cpp
@@ -9,6 +9,7 @@
 #include "debug.h"
 
 // Qt
+#include <QActionGroup>
 #include <QCoreApplication>
 #include <QDBusConnection>
 #include <QDBusInterface>
diff --git a/shell/standaloneappcorona.cpp b/shell/standaloneappcorona.cpp
index 4a9d07cf8..eb92269de 100644
--- a/shell/standaloneappcorona.cpp
+++ b/shell/standaloneappcorona.cpp
@@ -11,6 +11,7 @@
 
 #include <QAction>
 #include <QDebug>
+#include <QFile>
 #include <QQuickItem>
 
 #include <KActionCollection>