diff --git a/spider.lua b/spider.lua
index 14f7e54..c8a144b 100644
--- a/spider.lua
+++ b/spider.lua
@@ -1,6 +1,10 @@
 -- Translation support
 local S = minetest.get_translator("mobs_monster")
 
+-- check for default mod
+local mod_def = minetest.get_modpath("default")
+
+-- helper
 local get_velocity = function(self)
 
 	local v = self.object:get_velocity()
@@ -285,7 +289,7 @@ minetest.register_node(":mobs:cobweb", {
 	groups = {snappy = 1, disable_jump = 1},
 	is_ground_content = false,
 	drop = "farming:string",
-	sounds = default and default.node_sound_leaves_defaults()
+	sounds = mod_def and default.node_sound_leaves_defaults()
 })
 
 minetest.register_craft({
diff --git a/textures/mobs_tree_monster(template).png b/textures/mobs_tree_monster_template.png
similarity index 100%
rename from textures/mobs_tree_monster(template).png
rename to textures/mobs_tree_monster_template.png