diff --git a/gtk2_ardour/ardour_ui.h b/gtk2_ardour/ardour_ui.h
index 62209cfe15..2c840324e0 100644
--- a/gtk2_ardour/ardour_ui.h
+++ b/gtk2_ardour/ardour_ui.h
@@ -95,12 +95,6 @@ namespace ARDOUR {
 	class ControlProtocolInfo;
 }
 
-namespace ALSA {
-	class MultiChannelDevice;
-}
-
-#define FRAME_NAME "BaseFrame"
-
 extern sigc::signal<void>  ColorsChanged;
 extern sigc::signal<void>  DPIReset;