diff --git a/sources/qetgraphicsitem/qetshapeitem.cpp b/sources/qetgraphicsitem/qetshapeitem.cpp
index f2b11f71e..9dac33778 100644
--- a/sources/qetgraphicsitem/qetshapeitem.cpp
+++ b/sources/qetgraphicsitem/qetshapeitem.cpp
@@ -104,7 +104,13 @@ void QetShapeItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *opti
 		painter -> setRenderHint(QPainter::Antialiasing, false);
 		QRectF rec = boundingRect();
 		QPen pen(Qt::black);
-		pen.setWidth(1);
+
+#ifdef Q_WS_WIN
+	pen.setWidth(1);
+#elif Q_WS_MAC
+	pen.setWidth(0.5);
+#endif
+
 		if (isSelected())
 			pen.setColor(Qt::red);
 		pen.setStyle(_shapeStyle);