diff --git a/builtin/item.lua b/builtin/item.lua
index f249d9e5a..cefc90886 100644
--- a/builtin/item.lua
+++ b/builtin/item.lua
@@ -362,10 +362,10 @@ minetest.nodedef_default = {
 	-- Node properties
 	drawtype = "normal",
 	visual_scale = 1.0,
-	tile_images = {""},
-	special_materials = {
-		{image="", backface_culling=true},
-		{image="", backface_culling=true},
+	tiles ={""},
+	special_tiles = {
+		{name="", backface_culling=true},
+		{name="", backface_culling=true},
 	},
 	alpha = 255,
 	post_effect_color = {a=0, r=0, g=0, b=0},
diff --git a/games/minimal/mods/default/init.lua b/games/minimal/mods/default/init.lua
index fc9ca0a8c..64dcbbdfe 100644
--- a/games/minimal/mods/default/init.lua
+++ b/games/minimal/mods/default/init.lua
@@ -1113,7 +1113,6 @@ minetest.register_node("default:sign_wall", {
 	paramtype2 = "wallmounted",
 	sunlight_propagates = true,
 	walkable = false,
-	metadata_name = "sign",
 	selection_box = {
 		type = "wallmounted",
 		--wall_top = <default>