diff --git a/libs/temporal/enums.cc b/libs/temporal/enums.cc
index 7ade9ebb80..0802a0c14e 100644
--- a/libs/temporal/enums.cc
+++ b/libs/temporal/enums.cc
@@ -72,3 +72,10 @@ void Temporal::init ()
 		libtemporal_initialized = true;
 	}
 }
+
+std::ostream&
+operator<< (std::ostream& o, Temporal::ratio_t const & r)
+{
+	return o << r.numerator() << '/' << r.denominator();
+}
+
diff --git a/libs/temporal/temporal/types.h b/libs/temporal/temporal/types.h
index adfd5bb121..1ac7e8ec76 100644
--- a/libs/temporal/temporal/types.h
+++ b/libs/temporal/temporal/types.h
@@ -125,4 +125,7 @@ extern void setup_enum_writer ();
 
 }
 
+std::ostream& operator<< (std::ostream& o, Temporal::ratio_t const & r);
+
+
 #endif /* __libpbd_position_types_h__ */