diff --git a/lib/session/call-session.js b/lib/session/call-session.js
index 48ca3eb5..fb6d9980 100644
--- a/lib/session/call-session.js
+++ b/lib/session/call-session.js
@@ -1676,7 +1676,7 @@ class CallSession extends Emitter {
       res.send(501);
       return;
     }
-    const params = {sip_method, sip_body: req.body};
+    const params = {sip_method, sip_body: req.body, sip_headers: req.headers};
     this.currentTask.performHook(this, this.sipRequestWithinDialogHook, params);
   }