diff -NurB a/src/luxmarkapp.cpp LuxMark-luxmark_v4.0alpha0/src/luxmarkapp.cpp
--- a/src/luxmarkapp.cpp	2020-09-04 20:36:21.782894492 +0200
+++ LuxMark-luxmark_v4.0alpha0/src/luxmarkapp.cpp	2020-09-04 20:37:41.231891279 +0200
@@ -33,7 +33,7 @@
 #if defined(__APPLE__)
 #include <OpenCL/cl.hpp>
 #else
-#include <CL/cl.hpp>
+#include <CL/cl2.hpp>
 #endif
 
 #include "luxmarkcfg.h"