diff --git a/src/Discord.Net/Models/Message.cs b/src/Discord.Net/Models/Message.cs
index a478964e2..3151a2b5f 100644
--- a/src/Discord.Net/Models/Message.cs
+++ b/src/Discord.Net/Models/Message.cs
@@ -233,6 +233,7 @@ namespace Discord
 			{
 				MentionedUsers = model.Mentions
 					.Select(x => _client.Users[x.Id, Channel.Server?.Id])
+					.Where(x => x != null)
 					.ToArray();
 			}
 			if (model.IsMentioningEveryone != null)