diff --git a/libs/surfaces/control_protocol/control_protocol/control_protocol.h b/libs/surfaces/control_protocol/control_protocol/control_protocol.h
index f77cd39b4f..35429f5c6c 100644
--- a/libs/surfaces/control_protocol/control_protocol/control_protocol.h
+++ b/libs/surfaces/control_protocol/control_protocol/control_protocol.h
@@ -140,6 +140,8 @@ public:
 	static StripableNotificationList const& last_selected () { return _last_selected; }
 	static void notify_stripable_selection_changed (StripableNotificationListPtr);
 
+	ARDOUR::Session& get_session() { return *_session; }
+
 protected:
 	void next_track (uint32_t initial_id);
 	void prev_track (uint32_t initial_id);
diff --git a/libs/surfaces/mackie/mackie_control_protocol.h b/libs/surfaces/mackie/mackie_control_protocol.h
index 702b2de33e..f1756851a0 100644
--- a/libs/surfaces/mackie/mackie_control_protocol.h
+++ b/libs/surfaces/mackie/mackie_control_protocol.h
@@ -215,7 +215,6 @@ class MackieControlProtocol
 	void update_global_button (int id, Mackie::LedState);
 	void update_global_led (int id, Mackie::LedState);
 
-	ARDOUR::Session & get_session() { return *_session; }
 	samplepos_t transport_sample() const;
 
 	int modifier_state() const { return _modifier_state; }
diff --git a/libs/surfaces/us2400/us2400_control_protocol.h b/libs/surfaces/us2400/us2400_control_protocol.h
index 81219660a2..51baeed93e 100644
--- a/libs/surfaces/us2400/us2400_control_protocol.h
+++ b/libs/surfaces/us2400/us2400_control_protocol.h
@@ -198,7 +198,6 @@ class US2400Protocol
 	void update_global_button (int id, US2400::LedState);
 	void update_global_led (int id, US2400::LedState);
 
-	ARDOUR::Session & get_session() { return *_session; }
 	samplepos_t transport_sample() const;
 
 	int modifier_state() const { return _modifier_state; }