diff --git a/resources/templates/provision/yealink/t21p/y000000000052.cfg b/resources/templates/provision/yealink/t21p/y000000000052.cfg
index 614034d4bc..4f0cfc15f4 100644
--- a/resources/templates/provision/yealink/t21p/y000000000052.cfg
+++ b/resources/templates/provision/yealink/t21p/y000000000052.cfg
@@ -957,8 +957,13 @@ phone_setting.backlight_time = {$yealink_backlight_time}
 #######################################################################################
 ##                                   Wallpaper                                       ##
 #######################################################################################
+
 wallpaper_upload.url = {$yealink_t21p_wallpaper}
+{if isset($yealink_t21p_wallpaper_filename)}
+phone_setting.backgrounds =  Config:{$yealink_t21p_wallpaper_filename}
+{else}
 phone_setting.backgrounds =  Config:yealink_t21p_wallpaper.png
+{/if}
 
 #######################################################################################
 ##                                   Multicast                                       ##