diff --git a/init.lua b/init.lua
index 685eff8..4605cb3 100644
--- a/init.lua
+++ b/init.lua
@@ -49,6 +49,10 @@ function homedecor_node_is_owned(pos, placer)
 		if not isprotect(5, pos, placer) then
 			ownername = S("someone")
 		end
+	elseif type(protector)=="table" and type(protector.can_dig)=="function" then 					-- Zeg9's protection mod
+		if not protector.can_dig(5, pos, placer) then
+			ownername = S("someone")
+		end
 	end
 
 	if ownername ~= false then
diff --git a/signs_lib.lua b/signs_lib.lua
index e139f0d..96296a6 100644
--- a/signs_lib.lua
+++ b/signs_lib.lua
@@ -115,11 +115,20 @@ minetest.register_node(":default:sign_wall", {
     groups = sign_groups,
 
     on_place = function(itemstack, placer, pointed_thing)
-        local def = minetest.registered_nodes[minetest.env:get_node(pointed_thing.above).name]
-        if homedecor_node_is_owned(pointed_thing.above, placer)
-         or (not def.buildable_to) then
-            return itemstack
-        end
+		local name
+		name = minetest.env:get_node(pointed_thing.under).name
+		if fences_with_sign[name] then
+			if homedecor_node_is_owned(pointed_thing.under, placer) then
+				return itemstack
+			end
+		else
+			name = minetest.env:get_node(pointed_thing.above).name
+			local def = minetest.registered_nodes[name]
+			if homedecor_node_is_owned(pointed_thing.above, placer)
+			 or (not def.buildable_to) then
+				return itemstack
+			end
+		end
 
 	local node=minetest.env:get_node(pointed_thing.under)
 
@@ -432,6 +441,7 @@ function homedecor_register_fence_with_sign(fencename, fencewithsignname)
                 minetest.pos_to_string(pos)
             ))
         end
+		if not homedecor_node_is_owned(pos, sender) then return end
 		homedecor_update_sign(pos, fields)
 	end
 	def_sign.on_punch = function(pos, node, puncher, ...)