diff --git a/Meade.net.Telescope/Properties/AssemblyInfo.cs b/Meade.net.Telescope/Properties/AssemblyInfo.cs
index ab1142a..4604c64 100644
--- a/Meade.net.Telescope/Properties/AssemblyInfo.cs
+++ b/Meade.net.Telescope/Properties/AssemblyInfo.cs
@@ -18,7 +18,7 @@ using System.Runtime.InteropServices;
 // Setting ComVisible to false makes the types in this assembly not visible 
 // to COM components.  If you need to access a type in this assembly from 
 // COM, set the ComVisible attribute to true on that type.
-[assembly: ComVisible(true)]
+[assembly: ComVisible(false)]
 
 // The following GUID is for the ID of the typelib if this project is exposed to COM
 [assembly: Guid("8b9fccb9-87ae-42f7-90af-079e13de6efb")]
diff --git a/Meade.net.Telescope/Telescope.cs b/Meade.net.Telescope/Telescope.cs
index c77994f..67ad2b8 100644
--- a/Meade.net.Telescope/Telescope.cs
+++ b/Meade.net.Telescope/Telescope.cs
@@ -35,6 +35,7 @@ namespace ASCOM.Meade.net
     [ProgId("ASCOM.MeadeGeneric.Telescope")]
     [ServedClassName("Meade Generic")]
     [ClassInterface(ClassInterfaceType.None)]
+    [ComVisible(true)]
     public class Telescope : ReferenceCountedObjectBase, ITelescopeV3
     {
         /// <summary>
diff --git a/Meade.net.focuser/Focuser.cs b/Meade.net.focuser/Focuser.cs
index 51787bf..e92e611 100644
--- a/Meade.net.focuser/Focuser.cs
+++ b/Meade.net.focuser/Focuser.cs
@@ -30,6 +30,7 @@ namespace ASCOM.Meade.net
     [ProgId("ASCOM.MeadeGeneric.focuser")]
     [ServedClassName("Meade Generic")]
     [ClassInterface(ClassInterfaceType.None)]
+    [ComVisible(true)]
     public class Focuser : ReferenceCountedObjectBase, IFocuserV3
     {
         /// <summary>
diff --git a/Meade.net.focuser/Properties/AssemblyInfo.cs b/Meade.net.focuser/Properties/AssemblyInfo.cs
index 46c7ed0..d77e77d 100644
--- a/Meade.net.focuser/Properties/AssemblyInfo.cs
+++ b/Meade.net.focuser/Properties/AssemblyInfo.cs
@@ -18,7 +18,7 @@ using System.Runtime.InteropServices;
 // Setting ComVisible to false makes the types in this assembly not visible 
 // to COM components.  If you need to access a type in this assembly from 
 // COM, set the ComVisible attribute to true on that type.
-[assembly: ComVisible(true)]
+[assembly: ComVisible(false)]
 
 // The following GUID is for the ID of the typelib if this project is exposed to COM
 [assembly: Guid("4ad7a6d4-6d54-4a9a-bbf3-895353e318f8")]