diff --git a/src/MixerBoard.cpp b/src/MixerBoard.cpp
index 1105ec6fe..6283767c7 100644
--- a/src/MixerBoard.cpp
+++ b/src/MixerBoard.cpp
@@ -43,6 +43,7 @@
 #include "UndoManager.h"
 #include "WaveTrack.h"
 
+#include "widgets/AButton.h"
 #include "widgets/Meter.h"
 
 
diff --git a/src/MixerBoard.h b/src/MixerBoard.h
index 68f1567e0..9fe2bc3e3 100644
--- a/src/MixerBoard.h
+++ b/src/MixerBoard.h
@@ -20,13 +20,13 @@
 #include <wx/scrolwin.h>
 #include <wx/statbmp.h>
 
-#include "widgets/AButton.h"
 #include "widgets/ASlider.h"
 #include "widgets/wxPanelWrapper.h"
 #include "commands/CommandManagerWindowClasses.h"
 
 class wxArrayString;
 class wxBitmapButton;
+class AButton;
 struct TrackListEvent;
 
 // containment hierarchy: