diff --git a/abstract_client.h b/abstract_client.h
index 5f37b0ba03..cb4960a361 100644
--- a/abstract_client.h
+++ b/abstract_client.h
@@ -28,6 +28,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #include <memory>
 
 #include <QElapsedTimer>
+#include <QPointer>
 
 namespace KWayland
 {
diff --git a/input.cpp b/input.cpp
index b4158d7fbc..97af259e7c 100644
--- a/input.cpp
+++ b/input.cpp
@@ -46,22 +46,9 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #include <decorations/decoratedclient.h>
 #include <KDecoration2/Decoration>
 // Qt
-#include <QDBusMessage>
-#include <QDBusPendingCall>
 #include <QKeyEvent>
-#include <QMouseEvent>
-#include <QTemporaryFile>
-// KDE
-#include <kkeyserver.h>
-//screenlocker
-#include <KScreenLocker/KsldApp>
 
 #include <xkbcommon/xkbcommon.h>
-#include <xkbcommon/xkbcommon-keysyms.h>
-// system
-#include <linux/input.h>
-#include <sys/mman.h>
-#include <unistd.h>
 
 namespace KWin
 {
diff --git a/input.h b/input.h
index 21b500b9c4..466b9bee01 100644
--- a/input.h
+++ b/input.h
@@ -21,16 +21,15 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define KWIN_INPUT_H
 #include <kwinglobals.h>
 #include <QAction>
-#include <QHash>
 #include <QObject>
 #include <QPoint>
-#include <QPointer>
-#include <QEvent>
-#include <QWeakPointer>
 #include <config-kwin.h>
 
 class KGlobalAccelInterface;
 class QKeySequence;
+class QMouseEvent;
+class QKeyEvent;
+class QWheelEvent;
 
 namespace KWin
 {
@@ -41,11 +40,6 @@ class KeyboardInputRedirection;
 class PointerInputRedirection;
 class TouchInputRedirection;
 
-namespace Decoration
-{
-class DecoratedClientImpl;
-}
-
 namespace LibInput
 {
     class Connection;