diff --git a/CMakeLists.txt b/CMakeLists.txt
index a5fa846..cc5f053 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,143 +1,145 @@
 cmake_minimum_required(VERSION 3.0)
 
 project(LibKompareDiff2)
 
 set(QT_MIN_VERSION "5.9.0")
 set(KF_MIN_VERSION "5.53.0")
 
 find_package(ECM ${KF_MIN_VERSION} REQUIRED NO_MODULE)
 set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} ${ECM_MODULE_PATH})
 
 include(KDEInstallDirs)
 include(KDECMakeSettings)
 include(KDECompilerSettings NO_POLICY_SCOPE)
 include(ECMSetupVersion)
 include(ECMQtDeclareLoggingCategory)
 
 include(CMakePackageConfigHelpers)
 include(FeatureSummary)
 include(GenerateExportHeader)
 
 set(ADDITIONAL_REQUIRED_QT_COMPONENTS)
 if(BUILD_TESTING)
     list(APPEND ADDITIONAL_REQUIRED_QT_COMPONENTS Test)
 endif()
 
 find_package(Qt5 ${QT_MIN_VERSION} CONFIG REQUIRED
     COMPONENTS
         Core
         Widgets
         ${ADDITIONAL_REQUIRED_QT_COMPONENTS}
 )
 
 find_package(KF5 ${KF_MIN_VERSION} REQUIRED COMPONENTS
 	CoreAddons Codecs Config XmlGui I18n KIO
 )
 
 set(KOMPAREDIFF2_VERSION "5.2")
 ecm_setup_version(${KOMPAREDIFF2_VERSION}
                   VARIABLE_PREFIX LIBKOMPAREDIFF2
                   PACKAGE_VERSION_FILE "${CMAKE_CURRENT_BINARY_DIR}/LibKompareDiff2ConfigVersion.cmake"
                   SOVERSION 5)
 
 add_definitions(
     -DQT_DEPRECATED_WARNINGS
-    -DQT_DISABLE_DEPRECATED_BEFORE=0x050900
     -DQT_USE_QSTRINGBUILDER
     -DQT_NO_CAST_TO_ASCII
     -DQT_NO_CAST_FROM_ASCII
     -DQT_NO_CAST_FROM_BYTEARRAY
     -DQT_NO_URL_CAST_FROM_STRING
     -DQT_NO_SIGNALS_SLOTS_KEYWORDS
     -DQT_STRICT_ITERATORS
 )
-
+if (EXISTS "${CMAKE_SOURCE_DIR}/.git")
+   add_definitions(-DQT_DISABLE_DEPRECATED_BEFORE=0x060000)
+   add_definitions(-DKF_DISABLE_DEPRECATED_BEFORE_AND_AT=0x060000)
+endif()
 add_definitions(-DTRANSLATION_DOMAIN=\"libkomparediff2\")
 
 ecm_qt_declare_logging_category(komparediff2_DBG_SRCS
     HEADER komparediffdebug.h
     IDENTIFIER LIBKOMPAREDIFF2
     CATEGORY_NAME "libkomparediff"
 )
 
 set(komparediff2_SRCS
 	${komparediff2_DBG_SRCS}
 	kompareprocess.cpp
 	komparemodellist.cpp
 	diffmodellist.cpp
 	diffmodel.cpp
 	difference.cpp
 	diffhunk.cpp
 	diffsettings.cpp
 	settingsbase.cpp
 	parser.cpp
 	parserbase.cpp
 	cvsdiffparser.cpp
 	diffparser.cpp
 	perforceparser.cpp
 	stringlistpair.cpp
 	kompare.cpp
 )
 
 add_library(komparediff2 ${komparediff2_SRCS})
 generate_export_header(komparediff2 BASE_NAME diff2)
 
 target_link_libraries(komparediff2
     PUBLIC
         KF5::XmlGui
         KF5::ConfigCore
         Qt5::Widgets
         Qt5::Core
     PRIVATE
         KF5::Codecs
         KF5::KIOCore
         KF5::I18n
         KF5::CoreAddons
 )
 
 target_include_directories(komparediff2 INTERFACE "$<INSTALL_INTERFACE:${KDE_INSTALL_INCLUDEDIR}>")
 
 set_target_properties(komparediff2 PROPERTIES
     VERSION ${LIBKOMPAREDIFF2_VERSION_STRING}
     SOVERSION ${LIBKOMPAREDIFF2_SOVERSION}
     EXPORT_NAME "KompareDiff2"
 )
 
 install(TARGETS komparediff2 EXPORT LibKompareDiff2Targets ${KDE_INSTALL_TARGETS_DEFAULT_ARGS})
 
 if (BUILD_TESTING)
     add_subdirectory(tests)
 endif()
 
 install(FILES
     ${CMAKE_CURRENT_BINARY_DIR}/diff2_export.h
     settingsbase.h
     diffsettings.h
     komparemodellist.h
     difference.h
     diffmodel.h
     diffmodellist.h
     marker.h
     kompare.h
     diffhunk.h
     DESTINATION ${KDE_INSTALL_INCLUDEDIR}/libkomparediff2  COMPONENT Devel
 )
 
 # Config.cmake file.
 set(_LibKompareDiff2_CONFIG_DEST "${KDE_INSTALL_CMAKEPACKAGEDIR}/LibKompareDiff2")
 
 configure_package_config_file(
     "${CMAKE_SOURCE_DIR}/LibKompareDiff2Config.cmake.in"
     "${CMAKE_BINARY_DIR}/LibKompareDiff2Config.cmake"
     INSTALL_DESTINATION  "${_LibKompareDiff2_CONFIG_DEST}"
 )
 
 install( FILES
         "${CMAKE_CURRENT_BINARY_DIR}/LibKompareDiff2ConfigVersion.cmake"
         "${CMAKE_BINARY_DIR}/LibKompareDiff2Config.cmake"
         DESTINATION "${_LibKompareDiff2_CONFIG_DEST}" )
 install( EXPORT LibKompareDiff2Targets
          DESTINATION "${_LibKompareDiff2_CONFIG_DEST}"
          FILE LibKompareDiff2Targets.cmake )
 
 feature_summary(WHAT ALL FATAL_ON_MISSING_REQUIRED_PACKAGES)