diff --git a/functions.lua b/functions.lua
index ed16a05..4103e54 100644
--- a/functions.lua
+++ b/functions.lua
@@ -15,10 +15,10 @@ function spears_throw (itemstack, player, pointed_thing)
 		local check_node = spears_check_node(node.name)
 		if check_node == nil then
 			return false
-		elseif check_node == SPEARS_NODE_CRACKY then
+		elseif check_node == 'cracky' then
 			minetest.sound_play("default_metal_footstep", {pos = pointed_a}, true)
 			return false
-		elseif check_node == SPEARS_NODE_STICKY then
+		elseif check_node == 'sticky' then
 			local spear_object = minetest.add_entity(vector.divide(vector.add(vector.multiply(pointed_a, 2), pointed_b), 3), spear)
 			spear_object:set_rotation(rotation)
 			spear_object:get_luaentity()._wear = wear
@@ -80,7 +80,7 @@ function spears_set_entity(spear_type, base_damage, toughness)
 			if self._stickpos ~= nil then -- Spear is stuck
 				local node = minetest.get_node(self._stickpos)
 				local check_node = spears_check_node(node.name)
-				if check_node ~= SPEARS_NODE_STICKY then -- Fall when node is removed
+				if check_node ~= 'sticky' then -- Fall when node is removed
 					self.object:remove()
 					minetest.add_item(pos, {name='spears:spear_' .. spear_type, wear = wear})
 					return false
@@ -107,7 +107,7 @@ function spears_set_entity(spear_type, base_damage, toughness)
 				-- Hit a node?
 				local node = minetest.get_node(spearhead_pos)
 				local check_node = spears_check_node(node.name)
-				if check_node == SPEARS_NODE_UNKNOWN then
+				if check_node == nil then
 					self.object:remove()
 					minetest.add_item(pos, {name='spears:spear_' .. spear_type, wear = wear})
 				elseif check_node ~= 'through' then