diff --git a/Surface_mesher/demo/Surface_mesher/mainwindow.cpp b/Surface_mesher/demo/Surface_mesher/mainwindow.cpp
index 63a8eb2c510..52dc76ce5c0 100644
--- a/Surface_mesher/demo/Surface_mesher/mainwindow.cpp
+++ b/Surface_mesher/demo/Surface_mesher/mainwindow.cpp
@@ -62,7 +62,7 @@ void MainWindow::dragEnterEvent(QDragEnterEvent *event)
 
 void MainWindow::dropEvent(QDropEvent *event)
 {
-  QString filename = event->mimeData()->urls().at(0).path();
+  QString filename = event->mimeData()->urls().at(0).toLocalFile();
   surface_open(filename);
   event->acceptProposedAction();
 }