diff --git a/resources/templates/provision/grandstream/gxp2135/{$mac}.xml b/resources/templates/provision/grandstream/gxp2135/{$mac}.xml
index 744e398677..f3d420b5d1 100644
--- a/resources/templates/provision/grandstream/gxp2135/{$mac}.xml
+++ b/resources/templates/provision/grandstream/gxp2135/{$mac}.xml
@@ -5720,7 +5720,8 @@
     <!-- # Internet Protocol. 0 - Both, prefer IPv4, 1 - Both, prefer IPv6, 2 - IPv4 Only, 3 - IPv6 Only. Default is 0 -->
     <!-- # Number: 0, 1, 2, 3 -->
     <!-- # Mandatory -->
-    <P1415>0</P1415>
+    {if isset($grandstream_ipv_mode)}<P1415>{$grandstream_ipv_mode}</P1415>{else}<P1415>0</P1415>{/if}
+
 
     <!-- # IP Address Mode. 0 - DHCP, 1 - Static IP, 2 - PPPoE. Default is 0 -->
     <!-- # Number: 0, 1, 2 -->