diff --git a/token-validator/token.go b/token-validator/token.go
index 168d6e7..e4fb91d 100644
--- a/token-validator/token.go
+++ b/token-validator/token.go
@@ -8,7 +8,10 @@ import (
 func GenerateToken(pkey []byte, id int, a... []byte) ([]byte, error) {
 	h := sha512.New()
 
-	h.Write([]byte(fmt.Sprintf("%x:%d", pkey, id)))
+	h.Write([]byte(fmt.Sprintf("%x", pkey)))
+	if id != 0 {
+		h.Write([]byte(fmt.Sprintf(":%d", id)))
+	}
 
 	for _, v := range a {
 		h.Write([]byte(":"))