diff --git a/CMakeLists.txt b/CMakeLists.txt
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -350,7 +350,6 @@
                  "Required for disallowing ptrace on kwin_wayland process")
 
 check_include_file("sys/sysmacros.h" HAVE_SYS_SYSMACROS_H)
-configure_file(config-kwin.h.cmake ${CMAKE_CURRENT_BINARY_DIR}/config-kwin.h )
 
 check_include_file("linux/vt.h" HAVE_LINUX_VT_H)
 add_feature_info("linux/vt.h"
@@ -366,6 +365,8 @@
                  HAVE_SCHED_RESET_ON_FORK
                  "Required for running kwin_wayland with real-time scheduling")
 
+configure_file(config-kwin.h.cmake ${CMAKE_CURRENT_BINARY_DIR}/config-kwin.h )
+
 ########### global ###############
 set(kwin_effects_dbus_xml ${CMAKE_CURRENT_SOURCE_DIR}/org.kde.kwin.Effects.xml)