diff --git a/notebooks/AGIPD/AGIPD_Correct_and_Verify.ipynb b/notebooks/AGIPD/AGIPD_Correct_and_Verify.ipynb
index 1ec74cdfb88c92c99aa8ccd02595d5169df73348..f091759260a925846c20ef96f18099f7948d70a5 100644
--- a/notebooks/AGIPD/AGIPD_Correct_and_Verify.ipynb
+++ b/notebooks/AGIPD/AGIPD_Correct_and_Verify.ipynb
@@ -625,7 +625,7 @@
     "        agipd_cal, agipd_metadata, pc_constants)\n",
     "\n",
     "if agipd_corr.corr_bools.get('xray_corr'):\n",
-    "    ff_constants = agipd_cal.illuminated_calibrations\n",
+    "    ff_constants = list(agipd_cal.illuminated_calibrations)\n",
     "    get_constants_and_update_metadata(\n",
     "        agipd_cal, agipd_metadata, ff_constants)\n",
     "\n",