diff --git a/libs/temporal/tempo.cc b/libs/temporal/tempo.cc
index 01d73d9aee..a0f11eff09 100644
--- a/libs/temporal/tempo.cc
+++ b/libs/temporal/tempo.cc
@@ -32,6 +32,7 @@
 #include "pbd/string_convert.h"
 
 #include "temporal/debug.h"
+#include "temporal/scope.h"
 #include "temporal/tempo.h"
 #include "temporal/types_convert.h"
 
diff --git a/libs/temporal/temporal/scope.h b/libs/temporal/temporal/scope.h
index caeb16b718..d4ea3ced57 100644
--- a/libs/temporal/temporal/scope.h
+++ b/libs/temporal/temporal/scope.h
@@ -25,10 +25,11 @@
 
 #include "temporal/debug.h"
 #include "temporal/tempo.h"
+#include "temporal/visibility.h"
 
 namespace Temporal {
 
-class ScopedTempoMapOwner
+class LIBTEMPORAL_API ScopedTempoMapOwner
 {
  public:
 	ScopedTempoMapOwner () : local_tempo_map_depth (0) {}
diff --git a/libs/temporal/temporal/tempo.h b/libs/temporal/temporal/tempo.h
index 9caff963d3..9af00e33e8 100644
--- a/libs/temporal/temporal/tempo.h
+++ b/libs/temporal/temporal/tempo.h
@@ -1010,8 +1010,8 @@ class /*LIBTEMPORAL_API*/ TempoMap : public PBD::StatefulDestructible
 
 	static void map_assert (bool expr, char const * exprstr, char const * file, int line);
 
-	void set_scope_owner (ScopedTempoMapOwner&);
-	void clear_scope_owner ();
+	LIBTEMPORAL_API	void set_scope_owner (ScopedTempoMapOwner&);
+	LIBTEMPORAL_API	void clear_scope_owner ();
 	ScopedTempoMapOwner* scope_owner() const { return _scope_owner; }
 
   private: