diff --git a/gtk2_ardour/marker_time_axis.h b/gtk2_ardour/marker_time_axis.h
index 67c3e2beff..bb30bc24db 100644
--- a/gtk2_ardour/marker_time_axis.h
+++ b/gtk2_ardour/marker_time_axis.h
@@ -33,9 +33,6 @@
 namespace ARDOUR {
 	class Session;
 }
-namespace ARDOUR {
-	class Menu;
-}
 
 class PublicEditor;
 class ImageFrameView ;