diff --git a/MediaBrowser.Dlna/Ssdp/SsdpHandler.cs b/MediaBrowser.Dlna/Ssdp/SsdpHandler.cs
index 60d58298bd..32c369a8ff 100644
--- a/MediaBrowser.Dlna/Ssdp/SsdpHandler.cs
+++ b/MediaBrowser.Dlna/Ssdp/SsdpHandler.cs
@@ -113,7 +113,9 @@ namespace MediaBrowser.Dlna.Ssdp
         {
             get
             {
-                return _devices.Values.SelectMany(i => i).ToList();
+                var devices = _devices.Values.ToList();
+
+                return devices.SelectMany(i => i).ToList();
             }
         }