diff --git a/src/fields.lua b/src/fields.lua
index ca54ba4..d92b19a 100644
--- a/src/fields.lua
+++ b/src/fields.lua
@@ -215,10 +215,10 @@ local function inv_fields(player, data, fields)
 	return set_fs(player)
 end
 
-local function select_item(player, data, _f)
+local function select_item(player, data, fields)
 	local item
 
-	for field in pairs(_f) do
+	for field in pairs(fields) do
 		if find(field, ":") then
 			item = field
 			break
diff --git a/src/gui.lua b/src/gui.lua
index 87985da..a532012 100644
--- a/src/gui.lua
+++ b/src/gui.lua
@@ -829,7 +829,7 @@ local function get_tooltip(item, info, pos)
 	return fmt("tooltip[%s;%s]", item, ESC(tooltip))
 end
 
-local function get_output_fs(fs, data, rcp, is_recipe, shapeless, right, btn_size, _btn_size)
+local function get_output_fs(fs, data, rcp, is_recipe, shapeless, right, btn_size, btn_size2)
 	local custom_recipe = i3.craft_types[rcp.type]
 	local cooking = rcp.type == "cooking"
 	local fuel = rcp.type == "fuel"
@@ -866,7 +866,7 @@ local function get_output_fs(fs, data, rcp, is_recipe, shapeless, right, btn_siz
 	end
 
 	local BTN_SIZE = i3.settings.item_btn_size
-	local arrow_X = right + 0.2 + (_btn_size or BTN_SIZE)
+	local arrow_X = right + 0.2 + (btn_size2 or BTN_SIZE)
 	local X = arrow_X + 1.2
 	local Y = data.yoffset + 1.4