diff --git a/raknet/const.go b/raknet/const.go
index 2faa0b4..8259b4a 100644
--- a/raknet/const.go
+++ b/raknet/const.go
@@ -2,17 +2,20 @@ package raknet
 
 import "time"
 
+var raknetMagic = [16]byte{0x00, 0xff, 0xff, 0x00, 0xfe, 0xfe, 0xfe, 0xfe, 0xfd, 0xfd, 0xfd, 0xfd, 0x12, 0x34, 0x56, 0x78}
+
 func RaknetMagic() []byte {
-	return []byte{0x00, 0xff, 0xff, 0x00, 0xfe, 0xfe, 0xfe, 0xfe, 0xfd, 0xfd, 0xfd, 0xfd, 0x12, 0x34, 0x56, 0x78}
+	b := raknetMagic
+	return b[:]
 }
 
 const (
-	MaxMTU    = 1400
-	MinMTU    = 400
+	MaxMTU      = 1400
+	MinMTU      = 400
 	MaxChannels = 32
 )
 
-var (
+const (
 	SessionTimeout        = 10 * time.Second
 	PingSendInterval      = 2500 * time.Millisecond
 	DetectionSendInterval = 5 * time.Second