diff --git a/src/lib/objgfx40/objgfx40/objgfx40.h b/src/lib/objgfx40/objgfx40/objgfx40.h
index 11a3bc0..34d7b5c 100644
--- a/src/lib/objgfx40/objgfx40/objgfx40.h
+++ b/src/lib/objgfx40/objgfx40/objgfx40.h
@@ -79,7 +79,8 @@
 };
 
 typedef 
-  struct ogPixelFmt {
+  class ogPixelFmt {
+   public:
     uInt8 BPP;
     uInt8 redFieldPosition;
     uInt8 greenFieldPosition;