diff --git a/msg.go b/msg.go
index fffadde..6871a3a 100644
--- a/msg.go
+++ b/msg.go
@@ -102,7 +102,7 @@ func parseSubTypeMessageAlchStockAck(m *ChatWarsMessage, r *regexp.Regexp) (*Cha
 
 	log.Printf("parseSubTypeMessageAlchStockAck : Start\n")
 
-	re := regexp.MustCompile(`\n\/aa_([0-9]{2}) ([a-zA-Z ']+) x (?[0-9]+)`)
+	re := regexp.MustCompile(`\n\/aa_([0-9]{2}) ([a-zA-Z ']+) x ([0-9]+)`)
 	for _, l := range re.FindAllStringSubmatch(r.ReplaceAllString(m.Text, "${Stuff}"), -1) {
 		log.Printf("parseSubTypeMessageAlchStockAck : %+q\n", l)
 		i := getObjItemID(l[1], ``)