1 files changed, 1 insertions, 0 deletions
diff --git a/gtk2_ardour/canvas.h b/gtk2_ardour/canvas.h
index 9fa737258c..8df2674db7 100644
--- a/gtk2_ardour/canvas.h
+++ b/gtk2_ardour/canvas.h
@@ -25,6 +25,7 @@ namespace Gnome {
 		class Item;
 		class Group;
 		class Canvas;
+		class Rect;
 		class SimpleRect;
 		class SimpleLine;
 		class Polygon;