diff --git a/libs/canvas/box.cc b/libs/canvas/box.cc
index 6f3a3b2dc0..6e42ff094b 100644
--- a/libs/canvas/box.cc
+++ b/libs/canvas/box.cc
@@ -256,7 +256,7 @@ Box::layout ()
 
 	if (yes_do_it) {
 		reposition_children ();
-		compute_bounding_box ();
+		(void) bounding_box ();
 
 		const double w = std::max (requested_width, _bounding_box.width());
 		const double h = std::max (requested_height, _bounding_box.height());
diff --git a/libs/canvas/grid.cc b/libs/canvas/grid.cc
index b5b2b5bf08..5b76894945 100644
--- a/libs/canvas/grid.cc
+++ b/libs/canvas/grid.cc
@@ -162,7 +162,7 @@ void
 Grid::reset_bg ()
 {
 	if (_bounding_box_dirty) {
-		compute_bounding_box ();
+		(void) bounding_box ();
 	}
 
 	if (!_bounding_box) {
diff --git a/libs/canvas/polygon.cc b/libs/canvas/polygon.cc
index 215d51ce6f..6751a1851f 100644
--- a/libs/canvas/polygon.cc
+++ b/libs/canvas/polygon.cc
@@ -129,7 +129,7 @@ Polygon::covers (Duple const & point) const
 	bool oddNodes = false;
 
 	if (_bounding_box_dirty) {
-		compute_bounding_box ();
+		(void) bounding_box ();
 	}
 
 	for (i = 0; i < npoints; i++) {