diff --git a/mods/tsm_pyramids/nodes.lua b/mods/tsm_pyramids/nodes.lua
index 7974f443..14817bce 100644
--- a/mods/tsm_pyramids/nodes.lua
+++ b/mods/tsm_pyramids/nodes.lua
@@ -5,7 +5,7 @@ for i=1,3 do
 		description = "Sandstone with "..img[i],
 		tiles = {"default_sandstone.png^tsm_pyramids_"..img[i]..".png"},
 		is_ground_content = true,
-		groups = {crumbly=2,cracky=3},
+		groups = {unbreakable=1},
 		sounds = default.node_sound_stone_defaults(),
 	})
 end
diff --git a/mods/tsm_pyramids/room.lua b/mods/tsm_pyramids/room.lua
index 0a371c2e..4de9995f 100644
--- a/mods/tsm_pyramids/room.lua
+++ b/mods/tsm_pyramids/room.lua
@@ -71,7 +71,7 @@ local function replace(str,iy)
 	if iy == 0 and str == "s" then out = "tsm_pyramids:" str = "sun" end
 	if iy == 3 and str == "s" then out = "tsm_pyramids:" str = "men" end
 	if str == "a" then out = "" end
-	if str == "c" then out = "maptools:" end
+	if str == "c" or str == "s" or str == "b" then out = "maptools:" end
 	return out..code[str]
 end