diff --git a/apps/chat.js b/apps/chat.js
index 971975b..8e45fae 100644
--- a/apps/chat.js
+++ b/apps/chat.js
@@ -514,9 +514,11 @@ export class chatgpt extends plugin {
       }
       if (e.user_id == Bot.uin) return false
       prompt = e.raw_message.trim()
-      let me = e.group.pickMember(Bot.uin)
-      let card = me.card || me.nickname
-      prompt = prompt.replace(`@${card}`, '').trim()
+      if (e.isGroup) {
+        let me = e.group.pickMember(Bot.uin)
+        let card = me.card || me.nickname
+        prompt = prompt.replace(`@${card}`, '').trim()
+      }
     } else {
       let ats = e.message.filter(m => m.type === 'at')
       if (!e.atme && ats.length > 0) {