diff --git a/mirai-core/src/commonMain/kotlin/network/protocol/packet/login/WtLogin.kt b/mirai-core/src/commonMain/kotlin/network/protocol/packet/login/WtLogin.kt
index a51fff259..3493a4a73 100644
--- a/mirai-core/src/commonMain/kotlin/network/protocol/packet/login/WtLogin.kt
+++ b/mirai-core/src/commonMain/kotlin/network/protocol/packet/login/WtLogin.kt
@@ -238,11 +238,17 @@ internal class WtLogin {
                 // 1, 15 -> onErrorMessage(tlvMap) ?: error("Cannot find error message")
                 else -> {
                     onErrorMessage(type.toInt(), tlvMap, bot)
-                        ?: error("Cannot find error message, unknown login result type: $type, TLVMap = ${tlvMap.structureToString()}")
+                        ?: error(
+                            "Cannot find error message, unknown login result type: $type, TLVMap = ${dumpTlvMap(tlvMap)}"
+                        )
                 }
             }
         }
 
+        private fun dumpTlvMap(tlvMap: TlvMap) {
+            tlvMap.entries.joinToString { "${it.key}=${it.value.toUHexString()}" }
+        }
+
         private fun onDevLockLogin(
             tlvMap: TlvMap,
             bot: QQAndroidBot