diff --git a/model_server/base/roiset.py b/model_server/base/roiset.py
index ce72a89b5714be64a6d8b7a20aba932ef5c71c6d..697f22a3bdeb4ecc1adfb61099a7864bf3e6f8db 100644
--- a/model_server/base/roiset.py
+++ b/model_server/base/roiset.py
@@ -588,7 +588,9 @@ class RoiSet(object):
             pad_to=None,
             expanded=False
         )
-        se_pa = df_exp.patch_mask_path.apply(lambda x: str(Path('tight_patch_masks') / x)).rename('tight_patch_masks')
+        se_pa = df_exp.patch_mask_path.apply(
+            lambda x: str(Path('tight_patch_masks') / x)
+        ).rename('tight_patch_masks_path')
         self._df = self._df.join(se_pa)
         df_fn = self.export_dataframe(where / 'dataframe' / (prefix + '.csv'))
         record['dataframe'] = str(Path('dataframe') / df_fn)