diff --git a/mirai-core-qqandroid/src/commonMain/kotlin/net/mamoe/mirai/qqandroid/network/protocol/packet/login/LoginPacket.kt b/mirai-core-qqandroid/src/commonMain/kotlin/net/mamoe/mirai/qqandroid/network/protocol/packet/login/LoginPacket.kt
index 582dbb029..3a6f9e104 100644
--- a/mirai-core-qqandroid/src/commonMain/kotlin/net/mamoe/mirai/qqandroid/network/protocol/packet/login/LoginPacket.kt
+++ b/mirai-core-qqandroid/src/commonMain/kotlin/net/mamoe/mirai/qqandroid/network/protocol/packet/login/LoginPacket.kt
@@ -172,7 +172,7 @@ internal object LoginPacket : PacketFactory<LoginPacket.LoginPacketResponse>("wt
 
     sealed class LoginPacketResponse : Packet {
         object Success : LoginPacketResponse()
-        sealed class Captcha : LoginPacketResponse {
+        sealed class Captcha : LoginPacketResponse() {
             class Slider(
                 val data: IoBuffer
             ) : Captcha()