diff --git a/projects/human-heterodimers-w-crosslinks/translate2modelcif.py b/projects/human-heterodimers-w-crosslinks/translate2modelcif.py
index 900c848a4a20dca0d774eee54355fd111338d63e..8b91dcfdbffe1bd6042f4a812d40e7b51dcf831b 100644
--- a/projects/human-heterodimers-w-crosslinks/translate2modelcif.py
+++ b/projects/human-heterodimers-w-crosslinks/translate2modelcif.py
@@ -947,7 +947,7 @@ def _get_assoc_zip_file(fle_path, data_json):
         details="archive with multiple files for model "
         + f"{data_json['mdl_num']}; rank {data_json['rank_num']}",
     )
-    zfile.file_format = "zip"
+    zfile.file_format = "other"
     return zfile