diff --git a/plugins/USBPrinting/USBPrinterOutputDeviceManager.py b/plugins/USBPrinting/USBPrinterOutputDeviceManager.py
index b2cab36fa3..248649f431 100644
--- a/plugins/USBPrinting/USBPrinterOutputDeviceManager.py
+++ b/plugins/USBPrinting/USBPrinterOutputDeviceManager.py
@@ -119,7 +119,7 @@ class USBPrinterOutputDeviceManager(QObject, OutputDevicePlugin, Extension):
             except FileNotFoundError:
                 # Should only happen in dev environments where the resources/firmware folder is absent.
                 self._usb_output_devices[printer_connection].setProgress(100, 100)
-                Logger.log("w", "No firmware found for printer %s called '%s'" % (printer_connection, file_name)
+                Logger.log("w", "No firmware found for printer %s called '%s'", printer_connection, file_name)
                 Message(i18n_catalog.i18nc("@info",
                     "Could not find firmware required for the printer at %s.") % printer_connection).show()
                 self._firmware_view.close()
diff --git a/plugins/UltimakerMachineActions/UpgradeFirmwareMachineAction.qml b/plugins/UltimakerMachineActions/UpgradeFirmwareMachineAction.qml
index ce2e2a39cb..153d8254ef 100644
--- a/plugins/UltimakerMachineActions/UpgradeFirmwareMachineAction.qml
+++ b/plugins/UltimakerMachineActions/UpgradeFirmwareMachineAction.qml
@@ -45,7 +45,7 @@ Cura.MachineAction
             anchors.topMargin: UM.Theme.getSize("default_margin").height
             width: parent.width
             wrapMode: Text.WordWrap
-            text: catalog.i18nc("@label", "The firmware shipping with new Printers works, but new versions tend to have more features and improvements.");
+            text: catalog.i18nc("@label", "The firmware shipping with new printers works, but new versions tend to have more features and improvements.");
         }
 
         Row