diff --git a/src/lib/objgfx40/objgfx40/ogTypes.h b/src/lib/objgfx40/objgfx40/ogTypes.h
index 0bc42d8..c163996 100644
--- a/src/lib/objgfx40/objgfx40/ogTypes.h
+++ b/src/lib/objgfx40/objgfx40/ogTypes.h
@@ -29,38 +29,44 @@
   ogNoModeSupport
 }; // ogErrorCode
 
-struct ogRGB8 {
+class ogRGB8 {
+ public:
   uInt8 red;
   uInt8 green;
   uInt8 blue;
 };
 
-struct ogRGBA8 {
+class ogRGBA8 {
+ public:
   uInt8 red;
   uInt8 green;
   uInt8 blue;
   uInt8 alpha;
 };
 
-struct ogRGB32 {
+class ogRGB32 {
+ public:
   uInt32 red;
   uInt32 green;
   uInt32 blue;
 };
 
-struct ogRGBA32 {
+class ogRGBA32 {
+ public:
   uInt32 red;
   uInt32 green;
   uInt32 blue;
   uInt32 alpha;
 };
 
-struct ogPoint2d {
+class ogPoint2d {
+ public:
   int32 x;
   int32 y;
 };
 
-struct ogPoint3d {
+class ogPoint3d {
+ public:
   int32 x;
   int32 y;
   int32 z;