Legend icon not scaled with renderLegend

[ClausB13]

Hi,
I am rendering a QwtPlot on a pixmap using QwtPlotRenderer and a painter with painter.scale(8,8).
The whole plot is scaled correctly including the line on the plot and the legend text, but the legend line/icon is not scaled up.
The QwtPlotCurve pen is set to a width of 3.

const int scale = 8;
QPixmap pixmap(width*scale, height*scale);
QPainter painter(&pixmap);
painter.scale(scale,scale);
QRect rect(0,0,width,height);
QwtPlotRenderer rend;
rend.render(plot, &painter, rect);
pixmap.save("pixmap.png");

const int scale = 8;
QPixmap pixmap(width*scale, height*scale);
QPainter painter(&pixmap);
painter.scale(scale,scale);
QRect rect(0,0,width,height);
QwtPlotRenderer rend;
rend.render(plot, &painter, rect);
pixmap.save("pixmap.png");

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I am using Qwt-6.1.0.
/Claus