diff --git a/Meade.net.Telescope.UnitTests/TelescopeUnitTests.cs b/Meade.net.Telescope.UnitTests/TelescopeUnitTests.cs
index 6cc6980..04e538a 100644
--- a/Meade.net.Telescope.UnitTests/TelescopeUnitTests.cs
+++ b/Meade.net.Telescope.UnitTests/TelescopeUnitTests.cs
@@ -2410,6 +2410,8 @@ namespace Meade.net.Telescope.UnitTests
         [TestCase(TelescopeList.LX200CLASSIC, "", "[FF][FF][FF][FF][FF][FF][FF][FF][FF][FF][FF][FF][FF][FF]  [FF][FF][FF][FF][FF][FF]", false)]   //The test case below is this same string encoded to return exactly what the telescope will return.
         [TestCase(TelescopeList.LX200CLASSIC, "", "\x00ff\x00ff\x00ff\x00ff\x00ff\x00ff\x00ff\x00ff\x00ff\x00ff\x00ff\x00ff\x00ff\x00ff  \x00ff\x00ff\x00ff\x00ff\x00ff\x00ff", false)]
         [TestCase(TelescopeList.Autostar497, TelescopeList.Autostar497_43Eg, "|", true)]
+        [TestCase(TelescopeList.Autostar497, TelescopeList.Autostar497_43Eg, "[7F]", true)]
+        [TestCase(TelescopeList.Autostar497, TelescopeList.Autostar497_43Eg, "\x00ff", true)]
         [TestCase(TelescopeList.Autostar497, TelescopeList.Autostar497_43Eg, "", false)]
         public void Slewing_WhenTelescopeNotSlewing_ThenReturnsFalse(string productName, string firmwareVersion, string response, bool isSlewing)
         {
diff --git a/Meade.net.Telescope/Telescope.cs b/Meade.net.Telescope/Telescope.cs
index 4a13778..5183e95 100644
--- a/Meade.net.Telescope/Telescope.cs
+++ b/Meade.net.Telescope/Telescope.cs
@@ -2107,12 +2107,18 @@ namespace ASCOM.Meade.net
                     return isSlewing;
                 }
 
-                if (result.Contains("[7F]"))
+                if (result.Equals("[7F]"))
                 {
                     isSlewing = true;
                     return isSlewing;
                 }
-                
+
+                if (result.Equals("\x00ff"))
+                {
+                    isSlewing = true;
+                    return isSlewing;
+                }
+
                 ////classic LX200 return bar with 32 chars. FF is contained  from left to right when slewing
                 //byte[] ba = Encoding.Default.GetBytes(result);
                 ////replace fill chars not belonging to a slew bar.  Are there others? The bar character is a FF in hex.