diff --git a/plugins/USBPrinting/USBPrinterOutputDeviceManager.py b/plugins/USBPrinting/USBPrinterOutputDeviceManager.py
index 603696f1c6..4dec2e3a06 100644
--- a/plugins/USBPrinting/USBPrinterOutputDeviceManager.py
+++ b/plugins/USBPrinting/USBPrinterOutputDeviceManager.py
@@ -105,7 +105,8 @@ class USBPrinterOutputDeviceManager(QObject, OutputDevicePlugin, Extension):
 
     @pyqtSlot(str)
     def updateAllFirmware(self, file_name):
-        file_name = file_name.replace("file://", "")  # File dialogs prepend the path with file://, which we don't need / want
+        if file_name.startswith("file://"):
+            file_name = QUrl(file_name).toLocalFile() # File dialogs prepend the path with file://, which we don't need / want
         if not self._usb_output_devices:
             Message(i18n_catalog.i18nc("@info", "Unable to update firmware because there are no printers connected.")).show()
             return