diff --git a/itemcontroller.lua b/itemcontroller.lua
index 6dd746d..3f8e0ef 100644
--- a/itemcontroller.lua
+++ b/itemcontroller.lua
@@ -183,16 +183,17 @@ local PAGES = {
     local function composeSortFuncs(...)
       local funcs = {...}
 
+      local invert = false
       local compose = nil
       for i=#funcs,1,-1 do
         local current = funcs[i]
-        local invert = false
         if type(current) == "boolean" then
           invert = current
-          i = i - 1
-          current = funcs[i]
+          goto continue
         end
         compose = current(invert, compose)
+        invert = false
+          ::continue::
       end
       return compose
     end