a

1 files changed, 1 insertions, 1 deletions

diff --git a/serialize/world-writer.cpp b/serialize/world-writer.cpp
index 13751fc4..ee955c47 100644
--- a/serialize/world-writer.cpp
+++ b/serialize/world-writer.cpp
@@ -407,7 +407,7 @@ void writer_state::serialize_chunk(const chunk& c, chunk_coords_ coord)
     auto s = binary_writer{chunk_buf.begin()};
 
     s << chunk_magic << coord.x << coord.y;
-    fm_assert(coord.z >= -8 && coord.z < 8);
+    fm_assert(coord.z >= chunk_min_z && coord.z <= chunk_max_z);
     s << coord.z;
 
     for (auto i = 0uz; i < TILE_COUNT; i++)