diff --git a/openflexure_microscope/api/default_extensions/zip_builder.py b/openflexure_microscope/api/default_extensions/zip_builder.py
index 62d3adfe..e168e42f 100644
--- a/openflexure_microscope/api/default_extensions/zip_builder.py
+++ b/openflexure_microscope/api/default_extensions/zip_builder.py
@@ -109,7 +109,7 @@ class ZipManager:
                 # Add to ZIP file if it exists
                 file_path = capture_obj.file
                 rel_path = os.path.relpath(
-                    file_path, microscope.camera.paths["default"]
+                    file_path, microscope.captures.paths["default"]
                 )
                 zipObj.write(file_path, arcname=rel_path)
                 # Update task progress