diff --git a/src/wrap_cl.hpp b/src/wrap_cl.hpp
index a61c6889387faa7e0b970f698efb4e077def49f2..76a4af52523a5f7bcb7a35a008371140991fd2cd 100644
--- a/src/wrap_cl.hpp
+++ b/src/wrap_cl.hpp
@@ -12,6 +12,7 @@
 #ifdef __APPLE__
 
 // Mac ------------------------------------------------------------------------
+#include "pyopencl_ext.h"
 #include <OpenCL/opencl.h>
 #ifdef HAVE_GL