diff --git a/gtk2_ardour/tempo_lines.cc b/gtk2_ardour/tempo_lines.cc
index ff7b8ad529..cdbde54961 100644
--- a/gtk2_ardour/tempo_lines.cc
+++ b/gtk2_ardour/tempo_lines.cc
@@ -36,6 +36,12 @@ TempoLines::TempoLines (ArdourCanvas::Container* group, double, ARDOUR::BeatsFra
 	lines.set_extent (ArdourCanvas::COORD_MAX);
 }
 
+TempoLines::~TempoLines ()
+{
+	delete _bfc;
+	_bfc = 0;
+}
+
 void
 TempoLines::tempo_map_changed()
 {
diff --git a/gtk2_ardour/tempo_lines.h b/gtk2_ardour/tempo_lines.h
index 7425f6aae3..be5e1315c9 100644
--- a/gtk2_ardour/tempo_lines.h
+++ b/gtk2_ardour/tempo_lines.h
@@ -27,6 +27,7 @@
 class TempoLines {
 public:
 	TempoLines (ArdourCanvas::Container* group, double screen_height, ARDOUR::BeatsFramesConverter* bfc);
+	~TempoLines ();
 
 	void tempo_map_changed();