1 files changed, 11 insertions, 0 deletions
diff --git a/pugl/pugl_gl.h b/pugl/pugl_gl.h
index 7789116..a13cba2 100644
--- a/pugl/pugl_gl.h
+++ b/pugl/pugl_gl.h
@@ -28,6 +28,13 @@ extern "C" {
 #endif
 
 /**
+   @defgroup gl OpenGL
+   OpenGL graphics support.
+   @ingroup pugl
+   @{
+*/
+
+/**
    OpenGL extension function.
 */
 typedef void (*PuglGlFunc)(void);
@@ -50,4 +57,8 @@ puglGlBackend(void);
 }  /* extern "C" */
 #endif
 
+/**
+   @}
+*/
+
 #endif // PUGL_PUGL_GL_H