diff --git a/python/lsst/ap/association/filterDiaSourceCatalog.py b/python/lsst/ap/association/filterDiaSourceCatalog.py
index 6ab3210a..5d89ea02 100644
--- a/python/lsst/ap/association/filterDiaSourceCatalog.py
+++ b/python/lsst/ap/association/filterDiaSourceCatalog.py
@@ -71,7 +71,7 @@ class FilterDiaSourceCatalogConnections(
     longTrailedSources = connTypes.Output(
         doc="Optional output temporarily storing long trailed diaSources.",
         dimensions=("instrument", "visit", "detector"),
-        storageClass="SourceCatalog",
+        storageClass="DataFrame",
         name="{fakesType}{coaddName}Diff_longTrailedSrc",
     )