diff --git a/lib/tasks/dial.js b/lib/tasks/dial.js
index 362a4a92..7eae9ed8 100644
--- a/lib/tasks/dial.js
+++ b/lib/tasks/dial.js
@@ -409,6 +409,7 @@ class TaskDial extends Task {
       '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('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
     };