diff --git a/src/spyglass/utils/dj_merge_tables.py b/src/spyglass/utils/dj_merge_tables.py
index 4805a8d9a..eddd77652 100644
--- a/src/spyglass/utils/dj_merge_tables.py
+++ b/src/spyglass/utils/dj_merge_tables.py
@@ -513,7 +513,7 @@ def fetch_nwb(
             nwbs.extend(
                 fetch_nwb(
                     part_parent,
-                    (cls.analysis_nwbfile, "analysis_file_abs_path"),
+                    (cls().analysis_nwbfile, "analysis_file_abs_path"),
                     *attrs,
                     **kwargs,
                 )