diff --git a/qad/graphic/graphic.cpp b/qad/graphic/graphic.cpp
index 12038e2..6f53f1d 100644
--- a/qad/graphic/graphic.cpp
+++ b/qad/graphic/graphic.cpp
@@ -870,7 +870,7 @@ void Graphic::drawGrid() {
 	py = start + step;
 	cy = 0;
 	cx = gbx - 5;
-	grid_pen.setWidth(qMax<int>(qRound(thick / 1.4), 1));
+	grid_pen.setWidth(qMax<int>(qMax<int>(qRound(thick / 1.4), 1), grid_pen.width()));
 	QFont sf = font();
 	QFont nf = sf;
 	sf.setPointSizeF(qMax<qreal>(sf.pointSizeF() / 1.6, 7.));
@@ -994,7 +994,7 @@ void Graphic::drawGrid() {
 		painter->drawText(gbx, chei - font_sz.height(), wid, font_sz.height(), Qt::AlignCenter, label_x);
 	}
 
-	painter->setPen(QPen(grid_pen.color(), thick));
+	painter->setPen(QPen(grid_pen.color(), qMax<int>(thick, grid_pen.width())));
 	painter->drawRect(gbx, -1, wid + 6, hei + 6);
 }