diff --git a/gtk2_ardour/control_point.cc b/gtk2_ardour/control_point.cc
index 7632642adc..801bd5bb82 100644
--- a/gtk2_ardour/control_point.cc
+++ b/gtk2_ardour/control_point.cc
@@ -118,6 +118,14 @@ ControlPoint::visible () const
 void
 ControlPoint::reset (double x, double y, AutomationList::iterator mi, uint32_t vi, ShapeType shape)
 {
+	/* If this is too big, libart will confuse itself and segfault after it casts the bounding box
+	   of this automation line to ints.  Sigh.
+	*/
+	
+	if (x > INT32_MAX) {
+		x = INT32_MAX;
+	}
+	
 	_model = mi;
 	_view_index = vi;
 	move_to (x, y, shape);