diff --git a/rc/widgets.lua b/rc/widgets.lua
index fc9906f..c1a8e07 100644
--- a/rc/widgets.lua
+++ b/rc/widgets.lua
@@ -112,11 +112,11 @@ for s = 1, screen.count() do
     -- Add widgets to the wibox
     local onfirst = function(what)
        if s == 1 then return what end
-       return nil
+       return ""
     end
     local onsecond = function(what)
        if s == 2 or screen.count() == 1 then return what end
-       return nil
+       return ""
     end
 
     wibox[s].widgets = {