diff --git a/libs/canvas/text.cc b/libs/canvas/text.cc
index 6fa1d30d31..be5eb4b1f9 100644
--- a/libs/canvas/text.cc
+++ b/libs/canvas/text.cc
@@ -170,7 +170,10 @@ Text::render (Rect const & area, Cairo::RefPtr<Cairo::Context> context) const
 void
 Text::clamp_width (double w)
 {
+        begin_change ();
 	_clamped_width = w;
+        _bounding_box_dirty = true;
+        end_change ();
 }
 
 void