diff --git a/fs_edit_preconditions.lua b/fs_edit_preconditions.lua
index a5927f2..6e05fca 100644
--- a/fs_edit_preconditions.lua
+++ b/fs_edit_preconditions.lua
@@ -205,18 +205,31 @@ yl_speak_up.show_precondition = function(p, pname)
 		if(nr and check_trade[ nr ]) then
 			return check_trade[ nr ]
 		end
-	elseif(p.p_type == "player_inv" or p.p_type == "npc_inv") then
+	elseif(p.p_type == "player_inv" or p.p_type == "npc_inv" or p.p_type == "block_inv") then
 		local who = "The player"
+		local what = "\""..tostring(p.p_itemstack).."\" in his inventory."
 		if(p.p_type == "npc_inv") then
 			who = "The NPC"
+		elseif(p.p_type == "block_inv") then
+			if(not(p.p_pos) or type(p.p_pos) ~= "table"
+			  or not(p.p_pos.x) or not(p.p_pos.y) or not(p.p_pos.z)) then
+				return "ERROR: p.p_pos is "..minetest.serialize(p.p_pos)
+			end
+			who = "The block at "..minetest.pos_to_string(p.p_pos)
+			what = "\""..tostring(p.p_itemstack).."\" in inventory list \""..
+				tostring(p.p_inv_list_name).."\"."
 		end
 		if(p.p_value == "inv_contains") then
-			return who.." has \""..tostring(p.p_itemstack).."\" in his inventory."
+			return who.." has "..what
 		elseif(p.p_value == "inv_does_not_contain") then
-			return who.." does not have \""..tostring(p.p_itemstack).."\" in his inventory."
+			return who.." does not have "..what
 		elseif(p.p_value == "has_room_for") then
-			return who.." has room for \""..tostring(p.p_itemstack).."\" in his inventory."
+			return who.." has room for "..what
 		elseif(p.p_value == "inv_is_empty") then
+			if(p.p_type == "block_inv") then
+				return who.." has an empty inventory list \""..
+					tostring(p.p_inv_list_name).."\"."
+			end
 			return who.." has an empty inventory."
 		end
 	elseif(p.p_type == "custom") then
@@ -478,16 +491,30 @@ yl_speak_up.eval_precondition = function(player, n_id, p, other_options_true_or_
 			return not(player_inv:contains_item("main", trade.pay[1]))
 		end
 		return false
-	elseif(p.p_type == "player_inv" or p.p_type == "npc_inv") then
+	elseif(p.p_type == "player_inv" or p.p_type == "npc_inv" or p.p_type == "block_inv") then
 		local inv = nil
 		local inv_name = "main"
 		-- determine the right inventory
 		if(p.p_type == "player_inv") then
 			inv = player:get_inventory()
-		else
+		elseif(p.p_type == "npc_inv") then
 			inv = minetest.get_inventory({type="detached",
                                 name="yl_speak_up_npc_"..tostring(n_id)})
 			inv_name = "npc_main"
+		elseif(p.p_type == "block_inv") then
+			if(not(p.p_pos) or type(p.p_pos) ~= "table"
+			  or not(p.p_pos.x) or not(p.p_pos.y) or not(p.p_pos.z)) then
+				return false
+			end
+			local meta = minetest.get_meta(p.p_pos)
+			if(not(meta)) then
+				return false
+			end
+			inv = meta:get_inventory()
+			if(not(inv)) then
+				return false
+			end
+			inv_name = p.p_inv_list_name
 		end
 		if(    p.p_itemstack and p.p_value == "inv_contains") then
 			return inv:contains_item(inv_name, p.p_itemstack)