diff --git a/jdaviz/configs/cubeviz/plugins/moment_maps/moment_maps.py b/jdaviz/configs/cubeviz/plugins/moment_maps/moment_maps.py
index f7ba89a65f..7d75c413e6 100644
--- a/jdaviz/configs/cubeviz/plugins/moment_maps/moment_maps.py
+++ b/jdaviz/configs/cubeviz/plugins/moment_maps/moment_maps.py
@@ -60,6 +60,8 @@ def vue_calculate_moment(self, *args):
         except ValueError:
             raise ValueError("Moment must be a positive integer")
         # Need transpose to align JWST mirror shape. Not sure why.
+        # TODO: WCS can be grabbed from cube.wcs[:, :, 0] but CCDData will not take it.
+        #       But if we use NDData, glue-astronomy translator fails.
         self.moment = CCDData(analysis.moment(slab, order=n_moment).T)
 
         fname_label = self.dataset_selected.replace("[", "_").replace("]", "")