diff --git a/src/server/authserver/Server/BattlenetSocket.cpp b/src/server/authserver/Server/BattlenetSocket.cpp
index 6723024d868..ad589507a14 100644
--- a/src/server/authserver/Server/BattlenetSocket.cpp
+++ b/src/server/authserver/Server/BattlenetSocket.cpp
@@ -451,7 +451,7 @@ bool Battlenet::Socket::HandleRealmJoinRequest(PacketHeader& header, BitStream&
 
     RealmJoinResult result;
     Realm const* realm = sRealmList->GetRealm(join.Realm);
-    if (!realm)
+    if (!realm || realm->flag & (REALM_FLAG_INVALID | REALM_FLAG_OFFLINE))
     {
         Send(result);
         return true;