diff --git a/lib/config.js b/lib/config.js
index 428e5466..51808374 100644
--- a/lib/config.js
+++ b/lib/config.js
@@ -147,6 +147,7 @@ const JAMBONES_REDIS_SENTINELS = process.env.JAMBONES_REDIS_SENTINELS ? {
 const JAMBONZ_RECORD_WS_BASE_URL = process.env.JAMBONZ_RECORD_WS_BASE_URL;
 const JAMBONZ_RECORD_WS_USERNAME = process.env.JAMBONZ_RECORD_WS_USERNAME;
 const JAMBONZ_RECORD_WS_PASSWORD = process.env.JAMBONZ_RECORD_WS_PASSWORD;
+const JAMBONZ_DISABLE_DIAL_PAI_HEADER = process.env.JAMBONZ_DISABLE_DIAL_PAI_HEADER || false;
 
 module.exports = {
   JAMBONES_MYSQL_HOST,
@@ -225,5 +226,6 @@ module.exports = {
   DEEPGRAM_API_KEY,
   JAMBONZ_RECORD_WS_BASE_URL,
   JAMBONZ_RECORD_WS_USERNAME,
-  JAMBONZ_RECORD_WS_PASSWORD
+  JAMBONZ_RECORD_WS_PASSWORD,
+  JAMBONZ_DISABLE_DIAL_PAI_HEADER
 };
diff --git a/lib/tasks/dial.js b/lib/tasks/dial.js
index 5e0c6f77..869ba47a 100644
--- a/lib/tasks/dial.js
+++ b/lib/tasks/dial.js
@@ -16,7 +16,7 @@ const ConfirmCallSession = require('../session/confirm-call-session');
 const dbUtils = require('../utils/db-utils');
 const debug = require('debug')('jambonz:feature-server');
 const {parseUri} = require('drachtio-srf');
-const {ANCHOR_MEDIA_ALWAYS} = require('../config');
+const {ANCHOR_MEDIA_ALWAYS, JAMBONZ_DISABLE_DIAL_PAI_HEADER} = require('../config');
 const { isOnhold } = require('../utils/sdp-utils');
 const { normalizeJambones } = require('@jambonz/verb-specifications');
 
@@ -433,7 +433,8 @@ class TaskDial extends Task {
     this.headers = {
       'X-Account-Sid': cs.accountSid,
       ...(req && req.has('X-CID') && {'X-CID': req.get('X-CID')}),
-      ...(req && req.has('P-Asserted-Identity') && {'P-Asserted-Identity': req.get('P-Asserted-Identity')}),
+      ...(req && req.has('P-Asserted-Identity') && !JAMBONZ_DISABLE_DIAL_PAI_HEADER &&
+        {'P-Asserted-Identity': req.get('P-Asserted-Identity')}),
       ...(req && req.has('X-Voip-Carrier-Sid') && {'X-Voip-Carrier-Sid': req.get('X-Voip-Carrier-Sid')}),
       // Put headers at the end to make sure opt.headers override all default behavior.
       ...this.headers