diff --git a/wi.lua b/wi.lua
index 27f159e..643e921 100644
--- a/wi.lua
+++ b/wi.lua
@@ -20,7 +20,7 @@ vicious.register(batpct, vicious.widgets.bat, function(widget, args)
   bat_charge = args[2]
   bat_time   = args[3]
 
-  if args[1] == "-" then
+  if args[1] == "−" then
     if bat_charge > 70 then
       baticon:set_image(beautiful.widget_batfull)
     elseif bat_charge > 30 then