diff --git a/define/hands.go b/define/hands.go
index aadc2e3..54cd472 100644
--- a/define/hands.go
+++ b/define/hands.go
@@ -1,4 +1,8 @@
 package define
 
-const HAND_TYPE_LEFT = 0x28
-const HAND_TYPE_RIGHT = 0x27
\ No newline at end of file
+type HandType int
+
+const (
+	HAND_TYPE_LEFT  HandType = 0x28
+	HAND_TYPE_RIGHT HandType = 0x27
+)