--- a/qtbase/src/plugins/platforms/windows/qwindowsmime.cpp	2018-10-16 09:37:06.000000000 +0200
+++ b/qtbase/src/plugins/platforms/windows/qwindowsmime.cpp	2019-04-01 10:47:48.657284500 +0200
@@ -1082,7 +1082,7 @@
     const QImage image = qvariant_cast<QImage>(mimeData->imageData());
     if (image.isNull())
         return false;
-    return cf == CF_DIBV5 || (cf == CF_DIB) || cf == int(CF_PNG);
+    return cf == CF_DIBV5 || (cf == CF_DIB);
 }
 
 bool QWindowsMimeImage::convertFromMime(const FORMATETC &formatetc, const QMimeData *mimeData, STGMEDIUM * pmedium) const