diff --git a/src/qt/dc.cpp b/src/qt/dc.cpp
index e84e1c6abd..977142be7c 100644
--- a/src/qt/dc.cpp
+++ b/src/qt/dc.cpp
@@ -133,9 +133,10 @@ int wxQtDCImpl::GetDepth() const
 wxSize wxQtDCImpl::GetPPI() const
 {
     QScreen *srn = QApplication::screens().at(0);
-    qreal dotsPerInch = (qreal)srn->logicalDotsPerInch();
+    if (!srn)
+        return wxSize(m_qtPainter->device()->logicalDpiX(), m_qtPainter->device()->logicalDpiY());
+    qreal dotsPerInch = srn->logicalDotsPerInch();
     return wxSize(round(dotsPerInch), round(dotsPerInch));
-//    return wxSize(m_qtPainter->device()->logicalDpiX(), m_qtPainter->device()->logicalDpiY());
 }
 
 void wxQtDCImpl::SetFont(const wxFont& font)