diff --git a/src/printsupport/kernel/qprintengine_win.cpp b/src/printsupport/kernel/qprintengine_win.cpp
index fc462e9a0a..6fa75338aa 100644
--- a/src/printsupport/kernel/qprintengine_win.cpp
+++ b/src/printsupport/kernel/qprintengine_win.cpp
@@ -1959,13 +1959,17 @@ static void draw_text_item_win(const QPointF &pos, const QTextItemInt &ti, HDC h
 void QWin32PrintEnginePrivate::updateCustomPaperSize()
 {
     const uint paperSize = devMode->dmPaperSize;
+    const double multiplier = qt_multiplierForUnit(QPrinter::Millimeter, resolution);
     has_custom_paper_size = false;
-    if (paperSize > 0 && mapDevmodePaperSize(paperSize) == QPrinter::Custom) {
+    if (paperSize == DMPAPER_USER) {
+        has_custom_paper_size = true;
+        paper_size = QSizeF((devMode->dmPaperWidth / 10.0) * multiplier, (devMode->dmPaperLength / 10.0) * multiplier);
+    } else if (mapDevmodePaperSize(paperSize) == QPrinter::Custom) {
         has_custom_paper_size = true;
         const QList<QPair<QSizeF, int> > paperSizes = printerPaperSizes(name);
         for (int i=0; i<paperSizes.size(); i++) {
             if ((uint)paperSizes.at(i).second == paperSize) {
-                paper_size = paperSizes.at(paperSize).first;
+                paper_size = paperSizes.at(i).first * multiplier;
                 has_custom_paper_size = false;
                 break;
             }