diff --git a/model/core.js b/model/core.js
index 87a833c..a2ca604 100644
--- a/model/core.js
+++ b/model/core.js
@@ -591,7 +591,7 @@ class Core {
           await e.reply(msg, true)
         }
       })
-      option.toolMode = (opt.settings.forceTool || Config.geminiForceToolKeywords?.find(k => prompt.includes(k))) ? 'ANY' : 'AUTO'
+      option.toolMode = (opt.settings.forceTool || Config.geminiForceToolKeywords?.find(k => prompt?.includes(k))) ? 'ANY' : 'AUTO'
       return await client.sendMessage(prompt, option)
     } else if (use === 'chatglm4') {
       const client = new ChatGLM4Client({