diff --git a/client/entities.go b/client/entities.go
index feb6ea2c..b8a91d7c 100644
--- a/client/entities.go
+++ b/client/entities.go
@@ -236,7 +236,7 @@ func (g *GroupInfo) UpdateMemo(newMemo string) {
 	}
 }
 
-func (g GroupInfo) UpdateGroupHeadPortrait(img []byte) {
+func (g *GroupInfo) UpdateGroupHeadPortrait(img []byte) {
 	if g.AdministratorOrOwner() {
 		_ = g.client.uploadGroupHeadPortrait(g.Uin, img)
 	}