diff --git a/usbcontroller.cpp b/usbcontroller.cpp
index 95c75dc..8a9dcff 100644
--- a/usbcontroller.cpp
+++ b/usbcontroller.cpp
@@ -436,7 +436,7 @@ void usbController::runTimer()
         {
             if (usbDevice == shuttleXpress || usbDevice == shuttlePro2)
             {
-                if (shutpos < 0x08)
+                if (shutpos > 0  && shutpos < 0x08)
                 {
                     shutMult = shutpos;
                     emit doShuttle(true, shutMult);