diff --git a/libs/surfaces/mackie/subview.cc b/libs/surfaces/mackie/subview.cc
index 8961fdac65..9721624f9b 100644
--- a/libs/surfaces/mackie/subview.cc
+++ b/libs/surfaces/mackie/subview.cc
@@ -40,6 +40,7 @@
 #include "pot.h"
 #include "strip.h"
 #include "subview.h"
+#include "subview_modes.h"
 #include "surface.h"
  
 using namespace ARDOUR;