diff --git a/modules/rhizo_base/files/etc/freeswitch/sip_profiles/external.xml b/modules/rhizo_base/files/etc/freeswitch/sip_profiles/external.xml
index 3c0bb4f..071703a 100644
--- a/modules/rhizo_base/files/etc/freeswitch/sip_profiles/external.xml
+++ b/modules/rhizo_base/files/etc/freeswitch/sip_profiles/external.xml
@@ -53,6 +53,7 @@
     <!-- ************************************************* -->
 
     <param name="aggressive-nat-detection" value="true"/>
+    <param name="nat-options-ping" value="true"/>
     <param name="inbound-codec-negotiation" value="generous"/>
     <param name="nonce-ttl" value="60"/>
     <param name="auth-calls" value="false"/>