diff --git a/MediaBrowser.Common/Net/IPNetAddress.cs b/MediaBrowser.Common/Net/IPNetAddress.cs
index f1428d4bef..4ca028f614 100644
--- a/MediaBrowser.Common/Net/IPNetAddress.cs
+++ b/MediaBrowser.Common/Net/IPNetAddress.cs
@@ -170,6 +170,11 @@ namespace MediaBrowser.Common.Net
                 address = address.MapToIPv4();
             }
 
+            if (address.AddressFamily != AddressFamily)
+            {
+                return false;
+            }
+
             var (altAddress, altPrefix) = NetworkAddressOf(address, PrefixLength);
             return NetworkAddress.Address.Equals(altAddress) && NetworkAddress.PrefixLength >= altPrefix;
         }