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-rw-r--r--libs/surfaces/push2/knob.cc2
1 files changed, 1 insertions, 1 deletions
diff --git a/libs/surfaces/push2/knob.cc b/libs/surfaces/push2/knob.cc
index 0b0e893858..fe745405b5 100644
--- a/libs/surfaces/push2/knob.cc
+++ b/libs/surfaces/push2/knob.cc
@@ -240,7 +240,7 @@ Push2Knob::render (Rect const & area, Cairo::RefPtr<Cairo::Context> context) con
Push2Knob::compute_bounding_box () const
{
if (!_canvas || _r == 0) {
- _bounding_box = boost::optional<Rect> ();
+ _bounding_box = Rect ();
_bounding_box_dirty = false;
return;
}