diff --git a/CMakeLists.txt b/CMakeLists.txt
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -17,6 +17,7 @@
 include(GenerateExportHeader)
 
 find_package(Qt5 ${QT_MIN_VERSION} CONFIG REQUIRED Widgets DBus X11Extras QuickControls2)
+find_package(Qt5Gui ${QT_MIN_VERSION} CONFIG REQUIRED Private)
 
 find_package(KF5 ${KF5_MIN_VERSION} REQUIRED COMPONENTS
                 Config ConfigWidgets I18n IconThemes KIO Notifications Wayland
diff --git a/autotests/CMakeLists.txt b/autotests/CMakeLists.txt
--- a/autotests/CMakeLists.txt
+++ b/autotests/CMakeLists.txt
@@ -13,8 +13,6 @@
     message(STATUS "Qt5Qml not found, QML autotests will not be built.")
 endif()
 
-include_directories( ${Qt5Gui_PRIVATE_INCLUDE_DIRS} ${Qt5PlatformSupport_PRIVATE_INCLUDE_DIRS} ${CMAKE_BINARY_DIR}/src/platformtheme )
-
 set(CONFIGFILE "${CMAKE_CURRENT_SOURCE_DIR}/kdeplatformtheme_kdeglobals")
 set(CHANGED_CONFIGFILE "${CMAKE_CURRENT_SOURCE_DIR}/kdeplatformtheme_changed_kdeglobals")
 configure_file(kdeplatformtheme_config.h.in ${CMAKE_CURRENT_BINARY_DIR}/kdeplatformtheme_config.h)
@@ -29,7 +27,8 @@
     add_test(NAME frameworkintegration-${_testname} COMMAND ${_testname})
     ecm_mark_as_test(${_testname})
     ecm_mark_nongui_executable(${_testname})
-    target_link_libraries(${_testname} Qt5::Test Qt5::DBus Qt5::X11Extras Qt5::QuickControls2 ${QT5PLATFORMSUPPORT_LIBS} KF5::ConfigWidgets KF5::ConfigCore KF5::IconThemes KF5::KIOFileWidgets KF5::I18n KF5::Notifications KF5::WindowSystem KF5::WaylandClient XCB::XCB)
+    target_include_directories(${_testname} PRIVATE ${CMAKE_BINARY_DIR}/src/platformtheme)
+    target_link_libraries(${_testname} Qt5::GuiPrivate Qt5::Test Qt5::DBus Qt5::X11Extras Qt5::QuickControls2 ${QT5PLATFORMSUPPORT_LIBS} KF5::ConfigWidgets KF5::ConfigCore KF5::IconThemes KF5::KIOFileWidgets KF5::I18n KF5::Notifications KF5::WindowSystem KF5::WaylandClient XCB::XCB)
 endmacro()
 
 set(platformThemeSRCS
diff --git a/src/platformtheme/CMakeLists.txt b/src/platformtheme/CMakeLists.txt
--- a/src/platformtheme/CMakeLists.txt
+++ b/src/platformtheme/CMakeLists.txt
@@ -17,9 +17,6 @@
 remove_definitions(-DQT_NO_SIGNALS_SLOTS_KEYWORDS)
 
 
-include_directories(${Qt5Core_PRIVATE_INCLUDE_DIRS})
-include_directories(${Qt5Gui_PRIVATE_INCLUDE_DIRS})
-
 set(platformtheme_SRCS
     qdbusmenubar.cpp # fork of Qt's qdbusmenubar with some added setters for our convenience
     kdeplatformtheme.cpp
@@ -39,6 +36,7 @@
 
 target_link_libraries(KDEPlasmaPlatformTheme
     PRIVATE
+        Qt5::GuiPrivate
         Qt5::DBus
         Qt5::X11Extras
         Qt5::QuickControls2