diff --git a/KScreenLockerConfig.cmake.in b/KScreenLockerConfig.cmake.in
--- a/KScreenLockerConfig.cmake.in
+++ b/KScreenLockerConfig.cmake.in
@@ -4,5 +4,6 @@
 find_dependency(Qt5Core @REQUIRED_QT_VERSION@)
 find_dependency(Qt5X11Extras @REQUIRED_QT_VERSION@)
 
+set(KSCREENLOCKER_DBUS_INTERFACES_DIR "@PACKAGE_KDE_INSTALL_DBUSINTERFACEDIR@")
 
 include("${CMAKE_CURRENT_LIST_DIR}/KScreenLockerTargets.cmake")