diff --git a/def.go b/def.go
index 7874e0a..8558c82 100644
--- a/def.go
+++ b/def.go
@@ -1,5 +1,9 @@
 package main
 
+import (
+	"regexp"
+)
+
 type ChatWarsMessage struct {
 	UserID64       int64  `json:"user_id"`
 	SenderUserID64 int64  `json:"sender_user_id"`