diff --git a/src/gui/image/qpixmap.cpp b/src/gui/image/qpixmap.cpp
index 852025117b8..ed477e767ba 100644
--- a/src/gui/image/qpixmap.cpp
+++ b/src/gui/image/qpixmap.cpp
@@ -678,6 +678,9 @@ qreal QPixmap::devicePixelRatio() const
 */
 void QPixmap::setDevicePixelRatio(qreal scaleFactor)
 {
+    if (isNull())
+        return;
+
     detach();
     data->setDevicePixelRatio(scaleFactor);
 }