diff --git a/_locales/en/messages.json b/_locales/en/messages.json
index 51583825..77fb453c 100644
--- a/_locales/en/messages.json
+++ b/_locales/en/messages.json
@@ -1688,5 +1688,13 @@
   "DeselectAll": {
     "message": "Deselect All",
     "description": ""
+  },
+  "Anthropic_System_Prompt": {
+    "message": "System Prompt",
+    "description": ""
+  },
+  "Anthropic_System_Prompt_Info": {
+    "message": "You can improve Claude performance by using a System Prompt to give it a role. This technique, known as role prompting, is the most powerful way to use system prompts with Claude. The right role can turn Claude from a general assistant into your virtual domain expert.",
+    "description": ""
   }
 }
diff --git a/options/mzta-options-default.js b/options/mzta-options-default.js
index 6efc2cfa..6405c1a0 100644
--- a/options/mzta-options-default.js
+++ b/options/mzta-options-default.js
@@ -50,6 +50,7 @@ export const prefs_default = {
     anthropic_model: '',
     anthropic_version: '2023-06-01',
     anthropic_max_tokens: 4096,
+    anthropic_system_prompt: '',
     dynamic_menu_force_enter: false,
     dynamic_menu_order_alphabet: true,
     placeholders_use_default_value: false,
diff --git a/pages/_lib/connection-ui.js b/pages/_lib/connection-ui.js
index 0042ad5c..22f24500 100644
--- a/pages/_lib/connection-ui.js
+++ b/pages/_lib/connection-ui.js
@@ -397,6 +397,19 @@ export async function injectConnectionUI({
       </label>
     </td>
   </tr>
+  <tr class="conntype_anthropic_api${tr_class ? ` ${tr_class}` : ''}">
+    <td>
+      <label>
+        <span class="opt_title">__MSG_Anthropic_System_Prompt__</span>
+      </label>
+    </td>
+    <td>
+      <label>
+        <textarea id="anthropic_system_prompt" name="anthropic_system_prompt" class="option-input option-textarea"></textarea>
+        <br>__MSG_Anthropic_System_Prompt_Info__
+      </label>
+    </td>
+  </tr>
   <tr class="conntype_anthropic_api${tr_class ? ` ${tr_class}` : ''}">
     <td>
       <label>