diff --git a/resources/templates/provision/grandstream/gxp21xxbk/{$mac}.xml b/resources/templates/provision/grandstream/gxp21xxbk/{$mac}.xml
index 82bb5c391b..1137d7c68f 100644
--- a/resources/templates/provision/grandstream/gxp21xxbk/{$mac}.xml
+++ b/resources/templates/provision/grandstream/gxp21xxbk/{$mac}.xml
@@ -480,7 +480,7 @@
 <!-- Dial Plan. Default value is { x+ | *x+ | *xx*x+ } -->
 <!-- String -->
 <!-- Mandatory -->
-<P290>{ x+ | *x+ | *xx*x+ }</P290>
+<P290>{$grandstream_dial_plan}</P290>
 
 
 <!-- Delayed Call Forward Wait Time (in seconds). Default is 20 -->
@@ -4417,4 +4417,4 @@ Outgoing calls. 0 - No, 1 - Yes. Default is 0 -->
 <P396></P396>
 
 </config>
-</gs_provision>
\ No newline at end of file
+</gs_provision>