diff --git a/builtin/game/features.lua b/builtin/game/features.lua
index db70e9a667..747b3aee73 100644
--- a/builtin/game/features.lua
+++ b/builtin/game/features.lua
@@ -51,6 +51,7 @@ core.features = {
 	on_timer_four_args = true,
 	particlespawner_exclude_player = true,
 	generate_decorations_biomes = true,
+	chunksize_vector = true,
 }
 
 function core.has_feature(arg)
diff --git a/doc/lua_api.md b/doc/lua_api.md
index 845959d134..8061d9dd3c 100644
--- a/doc/lua_api.md
+++ b/doc/lua_api.md
@@ -5849,6 +5849,8 @@ Utilities
       particlespawner_exclude_player = true,
       -- core.generate_decorations() supports `use_mapgen_biomes` parameter (5.14.0)
       generate_decorations_biomes = true,
+      -- 'chunksize' mapgen setting can be a vector, instead of a single number (5.15.0)
+      chunksize_vector = true,
   }
   ```