diff --git a/mesecons_mvps/init.lua b/mesecons_mvps/init.lua
index 410fa28..af28240 100644
--- a/mesecons_mvps/init.lua
+++ b/mesecons_mvps/init.lua
@@ -98,15 +98,16 @@ function mesecon.mvps_get_stack(pos, dir, maximum, all_pull_sticky)
 				-- optimization: don't check blocks that are already part of the stack
 				if not pos_set[minetest.hash_node_position(adjpos)] then
 					local adjnode = minetest.get_node(adjpos)
-					if minetest.registered_nodes[adjnode.name]
-					and minetest.registered_nodes[adjnode.name].mvps_sticky then
-						local sticksto = minetest.registered_nodes[adjnode.name]
-							.mvps_sticky(adjpos, adjnode)
+					local adjdef = minetest.registered_nodes[adjnode.name]
+					if adjdef
+					and adjdef.mvps_sticky then
+						local sticksto = adjdef.mvps_sticky(adjpos, adjnode)
 	
 						-- connects to this position?
 						for _, link in ipairs(sticksto) do
 							if vector.equals(link, np) then
 								frontiers:add(adjpos)
+								break
 							end
 						end
 					end