diff --git a/rc.lua.template b/rc.lua.template
index b2ba042..e040460 100644
--- a/rc.lua.template
+++ b/rc.lua.template
@@ -565,7 +565,7 @@ awful.rules.rules = {
 
     -- Set Firefox to always map on the first tag on screen 1.
     { rule = { class = "Firefox" },
-      properties = { screen = 1, tag = screen[1].tags[1] } },
+      properties = { screen = 1, tag = awful.util.tagnames[1] } },
 
     { rule = { class = "Gimp", role = "gimp-image-window" },
           properties = { maximized = true } },