diff --git a/src/gui/mainwindow.cpp b/src/gui/mainwindow.cpp
index 4874700..6082618 100644
--- a/src/gui/mainwindow.cpp
+++ b/src/gui/mainwindow.cpp
@@ -99,8 +99,7 @@ MainWindow::MainWindow()
         for (auto location : locations) {
             if (QFile::exists(location + QString("/Benutzerhandbuch.pdf"))) {
                 QDesktopServices::openUrl(
-                    QUrl(QString("file:///") + location + QString("/Benutzerhandbuch.pdf"),
-                         QUrl::TolerantMode));
+                    QUrl::fromLocalFile(location + QString("/Benutzerhandbuch.pdf")));
             }
         }
     });