diff --git a/notebooks/AGIPD/AGIPD_Correct_and_Verify.ipynb b/notebooks/AGIPD/AGIPD_Correct_and_Verify.ipynb
index fa33046e1fc4ecf0dc454931985dd0d61e53a402..59ee32e21946eed5f28607d69a564994c342dbf6 100644
--- a/notebooks/AGIPD/AGIPD_Correct_and_Verify.ipynb
+++ b/notebooks/AGIPD/AGIPD_Correct_and_Verify.ipynb
@@ -709,7 +709,7 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "def get_trains_data(run_folder, source, include, detector_id, tid=None, modules=16, fillvalue=np.nan):\n",
+    "def get_trains_data(run_folder, source, include, detector_id, tid=None, modules=16, fillvalue=None):\n",
     "    \"\"\"Load single train for all module\n",
     "\n",
     "    :param run_folder: Path to folder with data\n",