diff --git a/msg.go b/msg.go
index 6d472bd..9b1c5b7 100644
--- a/msg.go
+++ b/msg.go
@@ -177,7 +177,9 @@ func parseSubTypeMessageReportAck(m *ChatWarsMessage, r *regexp.Regexp) (*ChatWa
 	cwm := ChatWarsMessageReportAck{}
 	re := regexp.MustCompile(`([.^\n]*)\n`)
 	for i, l := range re.FindAllStringSubmatch(r.ReplaceAllString(m.Text, "${Extra}"), -1) {
-		log.Printf("parseSubTypeMessageReport : Extra[%d] : %d => %s\n", i, len(l[1]), l[1])
+		if len(l[1]) > 0 {
+			log.Printf("parseSubTypeMessageReport : Extra[%d] : %d => %s\n", i, len(l[1]), l[1])
+		}
 	}
 
 	/*