diff --git a/msg.go b/msg.go
index 0a2f29a..6e80cf8 100644
--- a/msg.go
+++ b/msg.go
@@ -13,6 +13,7 @@ func getMsgParsingRule(m *ChatWarsMessage) (*MessageParsingRule, error) {
 	var i int
 	for i = 0; i < len(msgParsingRules); i++ {
 		if msgParsingRules[i].re.FindStringSubmatch(m.Text) != nil {
+			log.Printf("getMsgParsingRule : text matching with %s.\n", msgParsingRules[i].Description)
 			if (msgParsingRules[i].ChatID64 == 0 || msgParsingRules[i].ChatID64 == m.ChatID64) && (msgParsingRules[i].SenderUserID64 == 0 || msgParsingRules[i].SenderUserID64 == m.TGSenderUserID64) {
 				break
 			}