diff --git a/mods/ITEMS/REDSTONE/mesecons_lightstone/init.lua b/mods/ITEMS/REDSTONE/mesecons_lightstone/init.lua
index 8e3bc1d50..d232df832 100644
--- a/mods/ITEMS/REDSTONE/mesecons_lightstone/init.lua
+++ b/mods/ITEMS/REDSTONE/mesecons_lightstone/init.lua
@@ -19,7 +19,7 @@ minetest.register_node("mesecons_lightstone:lightstone_off", {
 minetest.register_node("mesecons_lightstone:lightstone_on", {
 	tiles = {"jeija_lightstone_gray_on.png"},
 	inventory_image = minetest.inventorycube("jeija_lightstone_gray_off.png"),
-	groups = {handy=1, not_in_creative_inventory=1, mesecon = 2},
+	groups = {handy=1, not_in_creative_inventory=1, mesecon = 2, opaque = 1},
 	drop = "node mesecons_lightstone:lightstone_off",
 	is_ground_content = false,
 	paramtype = "light",