diff --git a/NTFServer.go b/NTFServer.go
index 7723b7f..e7fa328 100644
--- a/NTFServer.go
+++ b/NTFServer.go
@@ -328,6 +328,10 @@ func (this *NTFServer) HandleHubMessage(msg upstreamMessage) {
 			log.Printf("Delivering public message to group chat: %s", err.Error())
 		}
 
+	case libnmdc.EVENT_BAD_LOGIN_FAILURE:
+		this.DirectMessageTelegramUser(msg.telegramUserId, "The hub disconnected in a permanent way (login failure?). Consider re-registering with a different nick.")
+		this.kickAndDrop(msg.telegramUserId)
+
 	case libnmdc.EVENT_USER_JOINED, libnmdc.EVENT_USER_PART, libnmdc.EVENT_USER_UPDATED_INFO, libnmdc.EVENT_USERCOMMAND, libnmdc.EVENT_DEBUG_MESSAGE, libnmdc.EVENT_HUBNAME_CHANGED:
 		// ignore