diff --git a/CMakeLists.txt b/CMakeLists.txt
index 15a2f6e..4fc1ff9 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,124 +1,123 @@
 cmake_minimum_required(VERSION 3.5)
 
 set(KF5_VERSION "5.64.0") # handled by release scripts
 project(KWindowSystem VERSION ${KF5_VERSION})
 
 # ECM setup
 include(FeatureSummary)
 find_package(ECM 5.64.0  NO_MODULE)
 set_package_properties(ECM PROPERTIES TYPE REQUIRED DESCRIPTION "Extra CMake Modules." URL "https://projects.kde.org/projects/kdesupport/extra-cmake-modules")
 feature_summary(WHAT REQUIRED_PACKAGES_NOT_FOUND FATAL_ON_MISSING_REQUIRED_PACKAGES)
 
 set(CMAKE_MODULE_PATH ${ECM_MODULE_PATH})
 
 include(KDEInstallDirs)
 include(KDECMakeSettings)
 include(KDEFrameworkCompilerSettings NO_POLICY_SCOPE)
 
 include(ECMGenerateExportHeader)
 include(CMakePackageConfigHelpers)
 include(ECMSetupVersion)
 include(ECMGenerateHeaders)
 include(CMakeFindFrameworks)
 include(ECMQtDeclareLoggingCategory)
 
 include(ECMAddQch)
 include(ECMPoQmTools)
 
 set(EXCLUDE_DEPRECATED_BEFORE_AND_AT 0 CACHE STRING "Control the range of deprecated API excluded from the build [default=0].")
 
 option(BUILD_QCH "Build API documentation in QCH format (for e.g. Qt Assistant, Qt Creator & KDevelop)" OFF)
 add_feature_info(QCH ${BUILD_QCH} "API documentation in QCH format (for e.g. Qt Assistant, Qt Creator & KDevelop)")
 
 # TODO KF6: remove
 option(KWINDOWSYSTEM_NO_WIDGETS "Disable deprecated API including QWidget usage, so that KWindowSystem does not link to QtWidgets. Warning: this is binary and source incompatible.")
 if (KWINDOWSYSTEM_NO_WIDGETS)
     # ensure EXCLUDE_DEPRECATED_BEFORE_AND_AT is at least at the version where all QWidgets API is deprecated
     if (NOT EXCLUDE_DEPRECATED_BEFORE_AND_AT STREQUAL "CURRENT" AND
         EXCLUDE_DEPRECATED_BEFORE_AND_AT VERSION_LESS "5.62.0")
         set(EXCLUDE_DEPRECATED_BEFORE_AND_AT "5.62.0")
     endif()
 endif()
 
 ecm_setup_version(PROJECT VARIABLE_PREFIX KWINDOWSYSTEM
                         VERSION_HEADER "${CMAKE_CURRENT_BINARY_DIR}/kwindowsystem_version.h"
                         PACKAGE_VERSION_FILE "${CMAKE_CURRENT_BINARY_DIR}/KF5WindowSystemConfigVersion.cmake"
                         SOVERSION 5)
 
 # Dependencies
 set(REQUIRED_QT_VERSION 5.11.0)
 find_package(Qt5 ${REQUIRED_QT_VERSION} CONFIG REQUIRED Widgets)
 
 if (APPLE)
     cmake_find_frameworks(Carbon)
     cmake_find_frameworks(CoreFoundation)
 endif()
 
 if(WIN32)
    find_package(Qt5WinExtras REQUIRED)
 endif()
 
 if (NOT APPLE)
     find_package(X11)
 endif()
 
 set(KWINDOWSYSTEM_HAVE_X11 ${X11_FOUND})
 
 if(X11_FOUND)
     find_package(XCB COMPONENTS REQUIRED XCB KEYSYMS RES)
     find_package(Qt5 ${REQUIRED_QT_VERSION} CONFIG REQUIRED X11Extras)
     set_package_properties(X11_Xrender PROPERTIES DESCRIPTION "X Rendering Extension (libXrender)"
                            URL "http://www.x.org" TYPE RECOMMENDED
                            PURPOSE "Support for compositing, rendering operations, and alpha-blending")
     set(KWINDOWSYSTEM_HAVE_XRENDER ${X11_Xrender_FOUND})
     set(KWINDOWSYSTEM_HAVE_XFIXES ${X11_Xfixes_FOUND})
 endif()
 
 # Subdirectories
 if (IS_DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}/po")
     ecm_install_po_files_as_qm(po)
 endif()
 
 add_definitions(-DQT_NO_FOREACH)
 add_definitions(-DQT_DISABLE_DEPRECATED_BEFORE=0x050d00)
-add_definitions(-DQT_DEPRECATED_WARNINGS_SINCE=0x060000)
 
 add_subdirectory(src)
 if (BUILD_TESTING)
     add_subdirectory(autotests)
     add_subdirectory(tests)
 endif()
 
 # create a Config.cmake and a ConfigVersion.cmake file and install them
 set(CMAKECONFIG_INSTALL_DIR "${KDE_INSTALL_CMAKEPACKAGEDIR}/KF5WindowSystem")
 
 if (BUILD_QCH)
     ecm_install_qch_export(
         TARGETS KF5WindowSystem_QCH
         FILE KF5WindowSystemQchTargets.cmake
         DESTINATION "${CMAKECONFIG_INSTALL_DIR}"
         COMPONENT Devel
     )
     set(PACKAGE_INCLUDE_QCHTARGETS "include(\"\${CMAKE_CURRENT_LIST_DIR}/KF5WindowSystemQchTargets.cmake\")")
 endif()
 
 configure_package_config_file("${CMAKE_CURRENT_SOURCE_DIR}/KF5WindowSystemConfig.cmake.in"
                               "${CMAKE_CURRENT_BINARY_DIR}/KF5WindowSystemConfig.cmake"
                               INSTALL_DESTINATION  ${CMAKECONFIG_INSTALL_DIR}
                               )
 
 install(FILES  "${CMAKE_CURRENT_BINARY_DIR}/KF5WindowSystemConfig.cmake"
                "${CMAKE_CURRENT_BINARY_DIR}/KF5WindowSystemConfigVersion.cmake"
         DESTINATION "${CMAKECONFIG_INSTALL_DIR}"
         COMPONENT Devel )
 
 install(EXPORT KF5WindowSystemTargets DESTINATION "${CMAKECONFIG_INSTALL_DIR}" FILE KF5WindowSystemTargets.cmake NAMESPACE KF5:: )
 
 
 install(FILES ${CMAKE_CURRENT_BINARY_DIR}/kwindowsystem_version.h
         DESTINATION ${KDE_INSTALL_INCLUDEDIR_KF5} COMPONENT Devel )
 
 install(FILES kwindowsystem.categories  DESTINATION  ${KDE_INSTALL_LOGGINGCATEGORIESDIR})
 
 
 feature_summary(WHAT ALL FATAL_ON_MISSING_REQUIRED_PACKAGES)