diff --git a/common/net/system.go b/common/net/system.go
index da2289a5d..6edc4ca4a 100644
--- a/common/net/system.go
+++ b/common/net/system.go
@@ -31,6 +31,7 @@ type UDPConn = net.UDPConn
 type UnixAddr = net.UnixAddr
 type UnixConn = net.UnixConn
 
+// IP is an alias for net.IP.
 type IP = net.IP
 type IPMask = net.IPMask
 type IPNet = net.IPNet
diff --git a/common/protocol/headers.go b/common/protocol/headers.go
index ecf798f03..00945f8e6 100644
--- a/common/protocol/headers.go
+++ b/common/protocol/headers.go
@@ -80,8 +80,8 @@ type CommandSwitchAccount struct {
 	Host     net.Address
 	Port     net.Port
 	ID       *uuid.UUID
-	AlterIds uint16
 	Level    uint32
+	AlterIds uint16
 	ValidMin byte
 }