diff --git a/_locales/en/messages.json b/_locales/en/messages.json
index 4ebc25c6..61c51288 100644
--- a/_locales/en/messages.json
+++ b/_locales/en/messages.json
@@ -1434,5 +1434,9 @@
   "prefs_OptionText_CustomGPT_Warn": {
     "message": "If a Project is specified in the options or in a prompt, it will override the Custom GPT setting.",
     "description": ""
+  },
+  "prefs_OptionText_Project_No_temporary_chat_warn": {
+    "message": "If a Project is specified in the options or in a prompt, the temporary chat will not be used.",
+    "description": ""
   }
 }
\ No newline at end of file
diff --git a/options/mzta-options.html b/options/mzta-options.html
index a0973042..7c56b274 100644
--- a/options/mzta-options.html
+++ b/options/mzta-options.html
@@ -166,7 +166,9 @@
         <td>
           <label>
             <input type="checkbox" id="chatgpt_web_tempchat" name="chatgpt_web_tempchat" class="option-input" />
-            &nbsp;<span>__MSG_prefs_OptionText_chatgpt_web_tempchat_info__</span>
+            &nbsp;<span>__MSG_prefs_OptionText_chatgpt_web_tempchat_info__
+              <br>__MSG_prefs_OptionText_Project_No_temporary_chat_warn__
+            </span>
           </label>
         </td>
       </tr>