diff --git a/libs/ardour/ardour/midi_region.h b/libs/ardour/ardour/midi_region.h
index d2afd02b70..dc9cc66e46 100644
--- a/libs/ardour/ardour/midi_region.h
+++ b/libs/ardour/ardour/midi_region.h
@@ -55,7 +55,7 @@ class ThawList;
 
 template<typename T> class MidiRingBuffer;
 
-class LIBARDOUR_API MidiRegion : public Region, public Temporal::TimeThing
+class LIBARDOUR_API MidiRegion : public Region, public Temporal::TimeDomainSwapper
 {
   public:
 	~MidiRegion();
diff --git a/libs/temporal/temporal/tempo.h b/libs/temporal/temporal/tempo.h
index 60e0521a41..9b83ebae8c 100644
--- a/libs/temporal/temporal/tempo.h
+++ b/libs/temporal/temporal/tempo.h
@@ -1273,7 +1273,7 @@ class LIBTEMPORAL_API DomainSwapInformation {
 
 	void add (timecnt_t& t) { counts.push_back (&t); }
 	void add (timepos_t& p) { positions.push_back (&p); }
-	void add (TimeThing& tt) { time_things.push_back (&tt); }
+	void add (TimeDomainSwapper& tt) { time_things.push_back (&tt); }
 	void clear ();
 
    private:
@@ -1281,7 +1281,7 @@ class LIBTEMPORAL_API DomainSwapInformation {
 
 	std::vector<timecnt_t*> counts;
 	std::vector<timepos_t*> positions;
-	std::vector<TimeThing*> time_things;
+	std::vector<TimeDomainSwapper*> time_things;
 	TimeDomain previous;
 
 	void undo ();
diff --git a/libs/temporal/temporal/types.h b/libs/temporal/temporal/types.h
index 43d1730b4f..d46a944906 100644
--- a/libs/temporal/temporal/types.h
+++ b/libs/temporal/temporal/types.h
@@ -124,8 +124,8 @@ enum RoundMode {
 
 extern void setup_enum_writer ();
 
-struct LIBTEMPORAL_API TimeThing {
-	virtual ~TimeThing() {}
+struct LIBTEMPORAL_API TimeDomainSwapper {
+	virtual ~TimeDomainSwapper() {}
 	virtual void swap_domain (Temporal::TimeDomain from, Temporal::TimeDomain to) = 0;
 };