diff --git a/src/kmainwindow.cpp b/src/kmainwindow.cpp
--- a/src/kmainwindow.cpp
+++ b/src/kmainwindow.cpp
@@ -55,7 +55,6 @@
 #include <kconfig.h>
 #include <ksharedconfig.h>
 #include <klocalizedstring.h>
-#include <kwindowsystem.h>
 #include <kconfiggroup.h>
 #include <kwindowconfig.h>
 #include <kconfiggui.h>
diff --git a/src/kxmlguiwindow.cpp b/src/kxmlguiwindow.cpp
--- a/src/kxmlguiwindow.cpp
+++ b/src/kxmlguiwindow.cpp
@@ -53,7 +53,6 @@
 #include <kconfig.h>
 #include <klocalizedstring.h>
 #include <kaboutdata.h>
-#include <kwindowsystem.h>
 #include <ksharedconfig.h>
 #include <kconfiggroup.h>