diff --git a/mods/ITEMS/mcl_walls/init.lua b/mods/ITEMS/mcl_walls/init.lua
index fbd07230d..1465d2948 100644
--- a/mods/ITEMS/mcl_walls/init.lua
+++ b/mods/ITEMS/mcl_walls/init.lua
@@ -146,6 +146,7 @@ function mcl_walls.register_wall(nodename, description, craft_material, tiles, i
 			is_ground_content = false,
 			tiles = tiles,
 			paramtype = "light",
+			sunlight_propagates = true,
 			groups = internal_groups,
 			drop = nodename,
 			node_box = {
@@ -171,6 +172,7 @@ function mcl_walls.register_wall(nodename, description, craft_material, tiles, i
 		},
 		tiles = tiles,
 		paramtype = "light",
+		sunlight_propagates = true,
 		is_ground_content = false,
 		groups = internal_groups,
 		drop = nodename,
@@ -195,6 +197,7 @@ function mcl_walls.register_wall(nodename, description, craft_material, tiles, i
 		},
 		tiles = tiles,
 		paramtype = "light",
+		sunlight_propagates = true,
 		is_ground_content = false,
 		groups = internal_groups,
 		drop = nodename,
@@ -216,6 +219,7 @@ function mcl_walls.register_wall(nodename, description, craft_material, tiles, i
 		description = description,
 		_doc_items_longdesc = "A piece of wall. It cannot be jumped over with a simple jump. When multiple of these are placed to next to each other, they will automatically build a nice wall structure.",
 		paramtype = "light",
+		sunlight_propagates = true,
 		is_ground_content = false,
 		groups = main_node_groups,
 		tiles = tiles,