diff --git a/Rhino.Licensing/Discovery/DiscoveryHost.cs b/Rhino.Licensing/Discovery/DiscoveryHost.cs
index 89312d2..40d5153 100644
--- a/Rhino.Licensing/Discovery/DiscoveryHost.cs
+++ b/Rhino.Licensing/Discovery/DiscoveryHost.cs
@@ -45,8 +45,12 @@ private void SetSocketOptionsForNic(NetworkInterface nic)
 				.ToList()
 				.ForEach(
 					address =>
-					socket.SetSocketOption(SocketOptionLevel.IP, SocketOptionName.AddMembership,
-					                       new MulticastOption(IPAddress.Parse(AllHostsMulticastIP), address.Address)));
+					{
+						try {
+							socket.SetSocketOption(SocketOptionLevel.IP, SocketOptionName.AddMembership,
+								new MulticastOption(IPAddress.Parse(AllHostsMulticastIP), address.Address));
+						} catch { }
+					});
 		}
 
 		private void StartListening()
@@ -155,4 +159,4 @@ public void Dispose()
 				socket.Dispose();
 		}
 	}
-}
\ No newline at end of file
+}