diff --git a/trace/icmp_ipv4.go b/trace/icmp_ipv4.go
index 96c68b6..7e1b86e 100644
--- a/trace/icmp_ipv4.go
+++ b/trace/icmp_ipv4.go
@@ -207,7 +207,7 @@ func gernerateID(ttl_int int) int {
 		id += "0"
 	}
 
-	res, _ := strconv.ParseInt(id, 2, 64)
+	res, _ := strconv.ParseInt(id, 2, 32)
 	return int(res)
 }