diff --git a/src/AutoPilotPlugins/PX4/PX4AdvancedFlightModesController.cc b/src/AutoPilotPlugins/PX4/PX4AdvancedFlightModesController.cc
index de83f7847d5e03a9f8451a47c2d0f85c8bd5568b..865a17664b02724a6a6dd298aaf1de1a8412919c 100644
--- a/src/AutoPilotPlugins/PX4/PX4AdvancedFlightModesController.cc
+++ b/src/AutoPilotPlugins/PX4/PX4AdvancedFlightModesController.cc
@@ -170,7 +170,7 @@ void PX4AdvancedFlightModesController::_validateConfiguration(void)
         for (int j=0; j<switchParams.count(); j++) {
             if (map != 0 && map == switchMappings[j]) {
                 _validConfiguration = false;
-                _configurationErrors += tr("%1 is set to same channel as %2.\n").arg(switchParams[j]).arg(attitudeParams[i]);
+                _configurationErrors += tr("%1 is set to same channel as %2.\n").arg(switchParams[j], attitudeParams[i]);
             }
         }
     }