diff --git a/mirai-core-qqandroid/src/androidMain/kotlin/net/mamoe/mirai/qqandroid/utils/SystemDeviceInfo.kt b/mirai-core-qqandroid/src/androidMain/kotlin/net/mamoe/mirai/qqandroid/utils/SystemDeviceInfo.kt
index 2db2d14bc..c9936f510 100644
--- a/mirai-core-qqandroid/src/androidMain/kotlin/net/mamoe/mirai/qqandroid/utils/SystemDeviceInfo.kt
+++ b/mirai-core-qqandroid/src/androidMain/kotlin/net/mamoe/mirai/qqandroid/utils/SystemDeviceInfo.kt
@@ -76,7 +76,7 @@ actual class SystemDeviceInfo actual constructor(context: Context) : DeviceInfo(
                 (context.applicationContext.getSystemService(Context.TELEPHONY_SERVICE) as TelephonyManager).deviceId
             }
         }.getOrElse { "" }
-    override val ipAddress: String get() = localIpAddress()
+    override val ipAddress: ByteArray get() = localIpAddress().split(".").map { it.toByte() }.takeIf { it.size == 4 }?.toByteArray() ?: byteArrayOf()
     override val androidId: ByteArray get() = Build.ID.toByteArray()
     override val apn: ByteArray get() = "wifi".toByteArray()
 
diff --git a/mirai-core-qqandroid/src/commonMain/kotlin/net/mamoe/mirai/qqandroid/network/protocol/packet/Tlv.kt b/mirai-core-qqandroid/src/commonMain/kotlin/net/mamoe/mirai/qqandroid/network/protocol/packet/Tlv.kt
index 7c78eb00d..008c8f70c 100644
--- a/mirai-core-qqandroid/src/commonMain/kotlin/net/mamoe/mirai/qqandroid/network/protocol/packet/Tlv.kt
+++ b/mirai-core-qqandroid/src/commonMain/kotlin/net/mamoe/mirai/qqandroid/network/protocol/packet/Tlv.kt
@@ -16,14 +16,15 @@ import kotlin.random.Random
  */
 inline class Tlv(val value: ByteArray)
 
-fun BytePacketBuilder.t1(uin: Long, ip: String) {
+fun BytePacketBuilder.t1(uin: Long, ip: ByteArray) {
+    require(ip.size == 4) { "ip.size must == 4" }
     writeShort(0x1)
     writeShortLVPacket {
         writeShort(1) // _ip_ver
         writeInt(Random.nextInt())
         writeInt(uin.toInt())
         writeTime()
-        writeFully(ByteArray(4))
+        writeFully(ip)
         writeShort(0)
     } shouldEqualsTo 20
 }
diff --git a/mirai-core-qqandroid/src/jvmMain/kotlin/net/mamoe/mirai/qqandroid/utils/SystemDeviceInfo.kt b/mirai-core-qqandroid/src/jvmMain/kotlin/net/mamoe/mirai/qqandroid/utils/SystemDeviceInfo.kt
index ed924c03a..8716e2b8c 100644
--- a/mirai-core-qqandroid/src/jvmMain/kotlin/net/mamoe/mirai/qqandroid/utils/SystemDeviceInfo.kt
+++ b/mirai-core-qqandroid/src/jvmMain/kotlin/net/mamoe/mirai/qqandroid/utils/SystemDeviceInfo.kt
@@ -27,7 +27,7 @@ actual class SystemDeviceInfo actual constructor(context: Context) : DeviceInfo(
     override val imsiMd5: ByteArray
         get() = ubyteArrayOf(0xD4u, 0x1Du, 0x8Cu, 0xD9u, 0x8Fu, 0x00u, 0xB2u, 0x04u, 0xE9u, 0x80u, 0x09u, 0x98u, 0xECu, 0xF8u, 0x42u, 0x7Eu).toByteArray()
     override val imei: String get() = "858414369211993"
-    override val ipAddress: String get() = localIpAddress()
+    override val ipAddress: ByteArray get() = localIpAddress().split(".").map { it.toByte() }.takeIf { it.size == 4 }?.toByteArray() ?: byteArrayOf()
     override val androidId: ByteArray get() = "QSR1.190920.001".toByteArray()
     override val apn: ByteArray get() = "wifi".toByteArray()