diff --git a/service/imService.go b/service/imService.go
index 55a8dd4..1ed5d50 100644
--- a/service/imService.go
+++ b/service/imService.go
@@ -108,6 +108,9 @@ func WSReceiveMessageService(userID, sessionID int, channel string, msg proto.WS
 			robotMsg += resp.Response
 			if resp.Done { //该消息完成
 				actx = resp.Context
+				if actxMap == nil {
+					actxMap = make(map[int][]int)
+				}
 				actxMap[sessionID] = actx
 				//创建消息
 				err2, msgID := CreateMessage(2, sessionID, 2, userID, robotMsg, 1) //机器人id为2,消息类型为2,状态为1