diff --git a/src/tools/pixelate/pixelatetool.cpp b/src/tools/pixelate/pixelatetool.cpp
index 62de8dbf..13b3d4d4 100644
--- a/src/tools/pixelate/pixelatetool.cpp
+++ b/src/tools/pixelate/pixelatetool.cpp
@@ -22,7 +22,6 @@
 #include <QGraphicsScene>
 #include <QImage>
 #include <QPainter>
-#include <cassert>
 
 PixelateTool::PixelateTool(QObject* parent)
   : AbstractTwoPointTool(parent)
@@ -65,13 +64,12 @@ void PixelateTool::process(QPainter& painter,
     QPoint& p0 = m_points.first;
     QPoint& p1 = m_points.second;
     QRect selection = QRect(p0, p1).normalized();
+    auto pixelRatio = pixmap.devicePixelRatio();
+    QRect selectionScaled =
+      QRect(p0 * pixelRatio, p1 * pixelRatio).normalized();
 
     // If thickness is less than 1, use old blur process
     if (m_thickness <= 1) {
-        auto pixelRatio = pixmap.devicePixelRatio();
-
-        QRect selectionScaled =
-          QRect(p0 * pixelRatio, p1 * pixelRatio).normalized();
 
         QGraphicsBlurEffect* blur = new QGraphicsBlurEffect;
         blur->setBlurRadius(10);
@@ -93,7 +91,7 @@ void PixelateTool::process(QPainter& painter,
         int height = selection.height() * (0.5 / qMax(1, m_thickness));
         QSize size = QSize(qMax(width, 1), qMax(height, 1));
 
-        QPixmap t = pixmap.copy(selection);
+        QPixmap t = pixmap.copy(selectionScaled);
         t = t.scaled(size, Qt::IgnoreAspectRatio, Qt::SmoothTransformation);
         t = t.scaled(selection.width(), selection.height());
         painter.drawImage(selection, t.toImage());