diff --git a/src/Socket/messages-recv.ts b/src/Socket/messages-recv.ts
index d95e21e..3d4f979 100644
--- a/src/Socket/messages-recv.ts
+++ b/src/Socket/messages-recv.ts
@@ -120,7 +120,7 @@ export const makeMessagesRecvSocket = (config: SocketConfig) => {
                 break
                 case proto.ProtocolMessage.ProtocolMessageType.EPHEMERAL_SETTING:
                     chatUpdate.ephemeralSettingTimestamp = toNumber(message.messageTimestamp)
-                    chatUpdate.ephemeralExpiration = protocolMsg.ephemeralExpiration
+                    chatUpdate.ephemeralExpiration = protocolMsg.ephemeralExpiration || null
                 break
             }
         } else if(message.messageStubType) {