diff --git a/CMakeLists.txt b/CMakeLists.txt
index 9f9e808668..9ddd4c8610 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -78,7 +78,7 @@ configure_file(config-kwin.h.cmake ${CMAKE_CURRENT_BINARY_DIR}/config-kwin.h )
 
 ########### global ###############
 
-include_directories(
+include_directories(BEFORE
     ${CMAKE_CURRENT_BINARY_DIR}/libkwineffects
     ${CMAKE_CURRENT_BINARY_DIR}
     ${CMAKE_CURRENT_SOURCE_DIR}/libkwineffects