diff --git a/libs/temporal/range.cc b/libs/temporal/range.cc
index 0ccfe5b83d..2663d32496 100644
--- a/libs/temporal/range.cc
+++ b/libs/temporal/range.cc
@@ -117,3 +117,18 @@ template<> OverlapType Temporal::coverage_exclusive_ends<int64_t> (int64_t sa, i
 	/* convert end positions to inclusive */
 	return coverage_inclusive_ends (sa, eaE-1, sb, ebE-1);
 }
+
+std::ostream&
+std::operator<< (std::ostream & o, RangeList const & rl)
+{
+	rl.dump (o);
+	return o;
+}
+
+std::ostream&
+std::operator<< (std::ostream & o, Range const & r)
+{
+	r.dump (o);
+	return o;
+}
+
diff --git a/libs/temporal/temporal/range.h b/libs/temporal/temporal/range.h
index 49af6fe1ca..95acf1298c 100644
--- a/libs/temporal/temporal/range.h
+++ b/libs/temporal/temporal/range.h
@@ -187,6 +187,10 @@ class LIBTEMPORAL_API Range {
 		return Temporal::coverage_exclusive_ends (_start, _end, s, e);
 	}
 
+	void dump (std::ostream& ostr) const {
+		ostr << "Range @ " << this << ' ' << _start << " .. " << _end;
+	}
+
   private:
 	timepos_t _start; ///< start of the range
 	timepos_t _end;   ///< end of the range (exclusive, see above)
@@ -194,6 +198,15 @@ class LIBTEMPORAL_API Range {
 
 typedef Range TimeRange;
 
+}
+
+namespace std {
+LIBTEMPORAL_API std::ostream&  operator<< (std::ostream & o, Temporal::Range const &);
+}
+
+namespace Temporal {
+
+
 class LIBTEMPORAL_API RangeList {
 public:
 	RangeList () : _dirty (false) {}
@@ -239,6 +252,13 @@ public:
 		_dirty = false;
 	}
 
+	void dump (std::ostream& ostr) const {
+		ostr << "RangeList @ " << this << std::endl;
+		for (auto const & r : _list) {
+			ostr << r << std::endl;
+		}
+	}
+
 private:
 
 	List _list;
@@ -255,4 +275,9 @@ struct LIBTEMPORAL_API RangeMove {
 
 }
 
+namespace std {
+LIBTEMPORAL_API std::ostream&  operator<< (std::ostream & o, Temporal::RangeList const &);
+}
+
+
 #endif /* __libtemporal_range_hpp__ */