diff --git a/mirai-core/src/main/java/net/mamoe/mirai/network/packet/ServerEvent.kt b/mirai-core/src/main/java/net/mamoe/mirai/network/packet/ServerEvent.kt
index 514700c56..012279ec4 100644
--- a/mirai-core/src/main/java/net/mamoe/mirai/network/packet/ServerEvent.kt
+++ b/mirai-core/src/main/java/net/mamoe/mirai/network/packet/ServerEvent.kt
@@ -137,7 +137,7 @@ class ServerFriendMessageEventPacket(input: DataInputStream, packetId: ByteArray
     @ExperimentalUnsignedTypes
     override fun decode() {
         //start at Sep1.0:27
-        qq = input.readInt()
+        qq = input.readInt(0)
         val msgLength = input.readShort(22)
         val fontLength = input.readShort(93+msgLength)
         val offset = msgLength+fontLength