diff --git a/app/views/users/get_user_info.json.jbuilder b/app/views/users/get_user_info.json.jbuilder
index 901ea87f0..20b45b1c4 100644
--- a/app/views/users/get_user_info.json.jbuilder
+++ b/app/views/users/get_user_info.json.jbuilder
@@ -4,7 +4,7 @@ json.nickname @user.nickname
 json.gender @user.gender
 json.login @user.login
 json.user_id @user.id
-json.image_url url_to_avatar(@user)
+json.image_url url_to_avatar(@user).blank? ? User::Avatar.get_letter_avatar_url("@") : url_to_avatar(@user)
 json.admin @user.admin?
 json.is_teacher @user.user_extension&.teacher?
 json.user_identity @user.identity