diff --git a/resources/templates/provision/yealink/t21p/{$mac}.cfg b/resources/templates/provision/yealink/t21p/{$mac}.cfg
index eb86d3d17c..b62b5358c0 100644
--- a/resources/templates/provision/yealink/t21p/{$mac}.cfg
+++ b/resources/templates/provision/yealink/t21p/{$mac}.cfg
@@ -1,4 +1,5 @@
 #!version:1.0.0.1
+#{$microtime}
 
 ##File header "#!version:1.0.0.1" can not be edited or deleted, and must be placed in the first line.##