diff --git a/conf/sip_profiles/internal/example.xml b/conf/sip_profiles/internal/example.xml
index 7ac8db1186..220df0dafe 100644
--- a/conf/sip_profiles/internal/example.xml
+++ b/conf/sip_profiles/internal/example.xml
@@ -28,6 +28,8 @@
   <!--<param name="caller-id-in-from" value="false"/>-->
   <!--extra sip params to send in the contact-->
   <!--<param name="contact-params" value="tport=tcp"/>-->
+  <!-- Put the extension in the contact -->
+  <!--<param name="extension-in-contact" value="true"/>-->
   <!--send an options ping every x seconds, failure will unregister and/or mark it down-->
   <!--<param name="ping" value="25"/>-->
   <!--</gateway>-->