diff --git a/libs/canvas/line_set.cc b/libs/canvas/line_set.cc
index 017c3e7617..7999dfe8d9 100644
--- a/libs/canvas/line_set.cc
+++ b/libs/canvas/line_set.cc
@@ -101,7 +101,7 @@ LineSet::render (Rect const & area, Cairo::RefPtr<Cairo::Context> context) const
 	for (auto const & l : _lines) {
 
 		Rect self;
-		const double shift = l.width * 0.5 - 1;
+		const double shift = 0.5;
 
 		if (_orientation == Horizontal) {
 			self = Rect (0, l.pos - (l.width/2.0), _extent, l.pos + (l.width/2.0));