diff --git a/ASCOM_Driver/FocuserDriver.cs b/ASCOM_Driver/FocuserDriver.cs
index 16a8364..5e49ea2 100644
--- a/ASCOM_Driver/FocuserDriver.cs
+++ b/ASCOM_Driver/FocuserDriver.cs
@@ -639,7 +639,7 @@ internal void WriteProfile()
             {
                 driverProfile.DeviceType = "Focuser";
                 driverProfile.WriteValue(driverID, traceStateProfileName, tl.Enabled.ToString());
-                driverProfile.WriteValue(driverID, autoDetectComPortProfileName, autoDetectComPortDefault.ToString());
+                driverProfile.WriteValue(driverID, autoDetectComPortProfileName, autoDetectComPort.ToString());
                 if (comPortOverride != null)
                 {
                     driverProfile.WriteValue(driverID, comPortProfileName, comPortOverride.ToString());