diff --git a/libs/ctrl-interface/control_protocol/control_protocol/types.h b/libs/ctrl-interface/control_protocol/control_protocol/types.h
index 5e5335c79a..7285fc1bde 100644
--- a/libs/ctrl-interface/control_protocol/control_protocol/types.h
+++ b/libs/ctrl-interface/control_protocol/control_protocol/types.h
@@ -20,7 +20,6 @@
 #define __ardour_control_protocol_types_h__
 
 #include <vector>
-#include <boost/smart_ptr.hpp>
 
 namespace ARDOUR {
 	class Route;
diff --git a/libs/surfaces/mackie/controls.h b/libs/surfaces/mackie/controls.h
index a0f4eaf36c..b7a3cdc018 100644
--- a/libs/surfaces/mackie/controls.h
+++ b/libs/surfaces/mackie/controls.h
@@ -27,8 +27,6 @@
 #include <string>
 #include <stdint.h>
 
-#include <boost/smart_ptr.hpp>
-
 #include "pbd/controllable.h"
 #include "pbd/signals.h"
 
diff --git a/libs/surfaces/mackie/mackie_control_protocol.h b/libs/surfaces/mackie/mackie_control_protocol.h
index d91bfd175f..9a8011c68b 100644
--- a/libs/surfaces/mackie/mackie_control_protocol.h
+++ b/libs/surfaces/mackie/mackie_control_protocol.h
@@ -31,8 +31,6 @@
 
 #include <sys/time.h>
 #include <pthread.h>
-#include <boost/smart_ptr.hpp>
-
 #define ABSTRACT_UI_EXPORTS
 #include "pbd/abstract_ui.h"
 #include "midi++/types.h"
diff --git a/libs/surfaces/mackie/subview.h b/libs/surfaces/mackie/subview.h
index cc31042717..5a5135cd82 100644
--- a/libs/surfaces/mackie/subview.h
+++ b/libs/surfaces/mackie/subview.h
@@ -20,8 +20,6 @@
 #ifndef __ardour_mackie_control_protocol_subview_h__
 #define __ardour_mackie_control_protocol_subview_h__
 
-#include <boost/smart_ptr.hpp>
-
 #include "pbd/signals.h"
 #include "ardour/types.h"
 
diff --git a/libs/surfaces/us2400/controls.h b/libs/surfaces/us2400/controls.h
index 73b2b187f7..21063ac25b 100644
--- a/libs/surfaces/us2400/controls.h
+++ b/libs/surfaces/us2400/controls.h
@@ -24,8 +24,6 @@
 #include <string>
 #include <stdint.h>
 
-#include <boost/smart_ptr.hpp>
-
 #include "pbd/controllable.h"
 #include "pbd/signals.h"
 
diff --git a/libs/surfaces/us2400/us2400_control_protocol.h b/libs/surfaces/us2400/us2400_control_protocol.h
index 4c576c4469..e45465eb91 100644
--- a/libs/surfaces/us2400/us2400_control_protocol.h
+++ b/libs/surfaces/us2400/us2400_control_protocol.h
@@ -26,8 +26,6 @@
 
 #include <sys/time.h>
 #include <pthread.h>
-#include <boost/smart_ptr.hpp>
-
 #define ABSTRACT_UI_EXPORTS
 #include "pbd/abstract_ui.h"
 #include "midi++/types.h"