1 files changed, 2 insertions, 0 deletions
diff --git a/FL/Fl_Device.H b/FL/Fl_Device.H
index 540ec8354..d2b9cfabb 100644
--- a/FL/Fl_Device.H
+++ b/FL/Fl_Device.H
@@ -126,6 +126,8 @@ public:
   virtual Fl_RGB_Image* rectangle_capture(Fl_Widget *widget, int x, int y, int w, int h) = 0;
   /** Returns the window's GL context */
   virtual GLContext context(Fl_Widget *widget) = 0;
+  /** Equivalent to widget->as_gl_window()->valid(v) */
+  virtual void valid(Fl_Widget *widget, char v) = 0;
   /** Returns the OpenGL plugin */
   static Fl_Device_Plugin *opengl_plugin();
 };