diff --git a/data/lua/core.lua b/data/lua/core.lua
index 87d392f1c2de..ee82497f14ab 100644
--- a/data/lua/core.lua
+++ b/data/lua/core.lua
@@ -834,11 +834,10 @@ if wesnoth.kernel_type() == "Game Lua Kernel" then
 		end
 		get_map()[loc] = new_ter
 	end)
-	wesnoth.get_map_size = wesnoth.deprecate_api('wesnoth.get_map_size', 'wesnoth.map.get().width,height,border_size', 1, nil, function()
+	wesnoth.get_map_size = wesnoth.deprecate_api('wesnoth.get_map_size', 'wesnoth.map.get().playable_width,playable_height,border_size', 1, nil, function()
 		local m = get_map()
-		local border = m.border_size
-		return m.width - 2 * border, m.height - 2 * border, border
-	end, 'Note: width and height on map.get() return the size including the border, while get_map_size() returns the size excluding the border')
+		return m.playable_width, m.playable_height, m.border_size
+	end)
 	wesnoth.special_locations = wesnoth.deprecate_api('wesnoth.special_locations', 'wesnoth.map.get():special_locations', 1, nil, setmetatable({}, {
 		__index = function(_, k) return get_map().special_locations[k] end,
 		__newindex = function(_, k, v) get_map().special_locations[k] = v end,
diff --git a/src/scripting/lua_terrainmap.cpp b/src/scripting/lua_terrainmap.cpp
index 9b4e147c1a3c..1e3de1645ad2 100644
--- a/src/scripting/lua_terrainmap.cpp
+++ b/src/scripting/lua_terrainmap.cpp
@@ -306,6 +306,8 @@ static int impl_terrainmap_get(lua_State *L)
 	// Find the corresponding attribute.
 	return_int_attrib("width", tm.total_width());
 	return_int_attrib("height", tm.total_height());
+	return_int_attrib("playable_width", tm.w());
+	return_int_attrib("playable_height", tm.h());
 	return_int_attrib("border_size", tm.border_size());
 	return_string_attrib("data", tm.to_string());