diff --git a/src/ui/preferences/GeneralSettings.qml b/src/ui/preferences/GeneralSettings.qml
index 8d79dab594a346e6a5b02013f25f6e23b3fbd944..37ea562daa4c87f072291098ca3b006041e8cdde 100644
--- a/src/ui/preferences/GeneralSettings.qml
+++ b/src/ui/preferences/GeneralSettings.qml
@@ -504,7 +504,7 @@ QGCView {
                             Item { width: rtkGrid.firstColWidth; height: 1 }
                             QGCButton {
                                 text:               qsTr("Save Current Base Position")
-                                enabled:            QGroundControl.gpsRtk.valid.value
+                                enabled:            QGroundControl.gpsRtk && QGroundControl.gpsRtk.valid.value
                                 Layout.columnSpan:  2
 
                                 onClicked: {