diff --git a/Meade.net.Telescope/Telescope.cs b/Meade.net.Telescope/Telescope.cs
index d8fcfdf..d35e2ea 100644
--- a/Meade.net.Telescope/Telescope.cs
+++ b/Meade.net.Telescope/Telescope.cs
@@ -778,6 +778,10 @@ namespace ASCOM.Meade.net
                 case TelescopeList.LX800:
                     return FirmwareIsGreaterThan(TelescopeList.LX800_11i);
                 case TelescopeList.LX200GPS:
+                    if (SharedResourcesWrapper.FirmwareVersion.Equals(TelescopeList.LX200GPS_4G0M,
+                            StringComparison.InvariantCultureIgnoreCase))
+                        return false;
+
                     return FirmwareIsGreaterThan(TelescopeList.LX200GPS_42G);
                 case TelescopeList.RCX400:
                     return FirmwareIsGreaterThan(TelescopeList.RCX400_22I);
diff --git a/Meade.net/TelescopeList.cs b/Meade.net/TelescopeList.cs
index 9cac51c..15c8307 100644
--- a/Meade.net/TelescopeList.cs
+++ b/Meade.net/TelescopeList.cs
@@ -29,6 +29,8 @@
         public const string LX200GPS_42F = "4.2f";
         // ReSharper disable once InconsistentNaming
         public const string LX200GPS_42G = "4.2g";
+
+        public const string LX200GPS_4G0M = "4G0m";
         #endregion
 
         #region LX800