diff --git a/pims/formats/utils/abstract.py b/pims/formats/utils/abstract.py
index 34d7fa6..3e7f3df 100644
--- a/pims/formats/utils/abstract.py
+++ b/pims/formats/utils/abstract.py
@@ -297,3 +297,7 @@ def annotations(self) -> List[ParsedMetadataAnnotation]:
     @cached_property
     def histogram(self):
         return self.histogram_reader
+
+    @cached_property
+    def main_path(self):
+        return self.path
diff --git a/pims/importer/listeners.py b/pims/importer/listeners.py
index f53393b..87ff319 100644
--- a/pims/importer/listeners.py
+++ b/pims/importer/listeners.py
@@ -299,7 +299,7 @@ def end_unpacking(
             uf.contentType = format.get_identifier()  # TODO
             uf.size = unpacked_path.size
             uf.filename = str(unpacked_path.relative_to(FILE_ROOT_PATH))
-            uf.originalFilename = str(format.path.name)
+            uf.originalFilename = str(format.main_path.name)
             uf.ext = ""
             uf.storage = parent.storage
             uf.user = parent.user