diff --git a/src/scmultiplex/__FRACTAL_MANIFEST__.json b/src/scmultiplex/__FRACTAL_MANIFEST__.json
index 13e6bdd..3a214f2 100644
--- a/src/scmultiplex/__FRACTAL_MANIFEST__.json
+++ b/src/scmultiplex/__FRACTAL_MANIFEST__.json
@@ -1175,6 +1175,11 @@
             "type": "string",
             "description": "Name of the ROI table to loop over. Needs to exists as a ROI table in the OME-Zarr file"
           },
+          "masking_label_name": {
+            "title": "Masking Label Name",
+            "type": "string",
+            "description": "Name of label by which to mask label_image."
+          },
           "level": {
             "default": 0,
             "title": "Level",