diff --git a/libs/temporal/tempo.cc b/libs/temporal/tempo.cc
index 34f1818fac..338821950a 100644
--- a/libs/temporal/tempo.cc
+++ b/libs/temporal/tempo.cc
@@ -2864,3 +2864,14 @@ TempoMap::twist_tempi (TempoSection* ts, const Tempo& bpm, const framepos_t fram
 }
 
 #endif
+
+void
+TempoMap::MementoBinder::set_state (XMLNode const & node, int version) const
+{
+	TempoMap::SharedPtr map (write_copy());
+	map->set_state (node, version);
+	update (map);
+	fetch ();
+}
+
+	
diff --git a/libs/temporal/temporal/tempo.h b/libs/temporal/temporal/tempo.h
index 143b8e8db9..1bbcf7efcd 100644
--- a/libs/temporal/temporal/tempo.h
+++ b/libs/temporal/temporal/tempo.h
@@ -771,7 +771,7 @@ class LIBTEMPORAL_API TempoMap : public PBD::StatefulDestructible
 	class MementoBinder : public MementoCommandBinder<TempoMap> {
           public:
 		MementoBinder () {}
-		void set_state (XMLNode const & node, int version) const { TempoMap::use()->set_state (node, version); }
+		void set_state (XMLNode const & node, int version) const;
 		XMLNode& get_state () const { return TempoMap::use()->get_state(); }
 		std::string type_name() const { return X_("Temporal::TempoMap"); }
 		void add_state (XMLNode*) {}