diff --git a/overviewer_core/world.py b/overviewer_core/world.py
index 5cc259e..445e70c 100644
--- a/overviewer_core/world.py
+++ b/overviewer_core/world.py
@@ -1339,7 +1339,7 @@ class RegionSet(object):
         # to SkyLight not being calculated, which results in mostly-black chunks,
         # so we'll just pretend they aren't there.
         if chunk_data.get("Status", "") not in ("full", "postprocessed", "fullchunk",
-                                                "mobs_spawned", ""):
+                                                "mobs_spawned", "spawn", ""):
             raise ChunkDoesntExist("Chunk %s,%s doesn't exist" % (x,z))
 
         # Turn the Biomes array into a 16x16 numpy array