diff --git a/resources/install/scripts/do_not_disturb.lua b/resources/install/scripts/do_not_disturb.lua
index f06164cb6a..25e0f900a8 100644
--- a/resources/install/scripts/do_not_disturb.lua
+++ b/resources/install/scripts/do_not_disturb.lua
@@ -91,8 +91,8 @@
 
 		--set the dial string
 			if (enabled == "true") then
-				local ep = (number_alias and #number_alias > 0) and number_alias or extension;
-				dial_string = "loopback/*99"..ep;
+				local user = (number_alias and #number_alias > 0) and number_alias or extension;
+				dial_string = "loopback/*99"..user;
 			end
 
 		--set do not disturb