diff --git a/client/entities.go b/client/entities.go
index 29232b06..4958c946 100644
--- a/client/entities.go
+++ b/client/entities.go
@@ -299,13 +299,7 @@ func (g *GroupInfo) AdministratorOrOwner() bool {
 
 func (g *GroupInfo) FindMember(uin int64) *GroupMemberInfo {
 	r := g.Read(func(info *GroupInfo) interface{} {
-		for _, m := range info.Members {
-			f := m
-			if f.Uin == uin {
-				return f
-			}
-		}
-		return nil
+		return info.FindMemberWithoutLock(uin)
 	})
 	if r == nil {
 		return nil
@@ -313,6 +307,16 @@ func (g *GroupInfo) FindMember(uin int64) *GroupMemberInfo {
 	return r.(*GroupMemberInfo)
 }
 
+func (g *GroupInfo) FindMemberWithoutLock(uin int64) *GroupMemberInfo {
+	for _, m := range g.Members {
+		f := m
+		if f.Uin == uin {
+			return f
+		}
+	}
+	return nil
+}
+
 func (g *GroupInfo) Update(f func(*GroupInfo)) {
 	g.lock.Lock()
 	defer g.lock.Unlock()
diff --git a/client/global.go b/client/global.go
index 21e1cc0e..f1beac84 100644
--- a/client/global.go
+++ b/client/global.go
@@ -451,7 +451,7 @@ func (c *QQClient) parseGroupMessage(m *msg.Message) *message.GroupMessage {
 		mem := group.FindMember(m.Head.GetFromUin())
 		if mem == nil {
 			group.Update(func(_ *GroupInfo) {
-				if mem = group.FindMember(m.Head.GetFromUin()); mem != nil {
+				if mem = group.FindMemberWithoutLock(m.Head.GetFromUin()); mem != nil {
 					return
 				}
 				info, _ := c.getMemberInfo(group.Code, m.Head.GetFromUin())