diff --git a/src/Discord.Net/Entities/WebSocket/CachedGroupChannel.cs b/src/Discord.Net/Entities/WebSocket/CachedGroupChannel.cs
index d64812ae2..da94a5b31 100644
--- a/src/Discord.Net/Entities/WebSocket/CachedGroupChannel.cs
+++ b/src/Discord.Net/Entities/WebSocket/CachedGroupChannel.cs
@@ -9,7 +9,7 @@ using Model = Discord.API.Channel;
 
 namespace Discord
 {
-    internal class CachedGroupChannel : GroupChannel, IGroupChannel, ICachedChannel, ICachedMessageChannel
+    internal class CachedGroupChannel : GroupChannel, IGroupChannel, ICachedChannel, ICachedMessageChannel, ICachedPrivateChannel
     {
         private readonly MessageManager _messages;