diff --git a/libsrc/include/incopengl.hpp b/libsrc/include/incopengl.hpp
index 63382b9b..4bc8a11e 100644
--- a/libsrc/include/incopengl.hpp
+++ b/libsrc/include/incopengl.hpp
@@ -6,6 +6,9 @@
 #    include <OpenGL/glu.h>
 #  else
 #  if defined(TOGL_NSOPENGL)
+// ?????? which one is right ??????
+// #    include <OpenGL/OpenGL.h>
+// #    include <OpenGL.h>
 #    include <gl.h>
 #    include <glu.h>
 #  else
diff --git a/ng/Togl2.1/togl.c b/ng/Togl2.1/togl.c
index c024aafe..a4bb55fd 100644
--- a/ng/Togl2.1/togl.c
+++ b/ng/Togl2.1/togl.c
@@ -17,7 +17,7 @@
 #define USE_TOGL_STUB_PROCS
 #include "togl.h"
 // #include <GL/glext.h>
-#include <tkInt.h>
+#include <tkInt.h>   // don't need it on osx ???
 #include <limits.h>
 
 #ifndef TOGL_USE_FONTS