diff --git a/notebooks/AGIPD/Characterize_AGIPD_Gain_Darks_NBC.ipynb b/notebooks/AGIPD/Characterize_AGIPD_Gain_Darks_NBC.ipynb
index b1298821c89d87efd19a4bc1a5b1c87d05615b33..db3fee5399502d0353ac816cbdbb14c2dbd0b14e 100644
--- a/notebooks/AGIPD/Characterize_AGIPD_Gain_Darks_NBC.ipynb
+++ b/notebooks/AGIPD/Characterize_AGIPD_Gain_Darks_NBC.ipynb
@@ -311,7 +311,7 @@
     "    h5path_f = h5path.format(channel)\n",
     "    h5path_idx_f = h5path_idx.format(channel)\n",
     "\n",
-    "    with h5py.File(fast_data_filename, \"r\", driver=\"core\") as infile:\n",
+    "    with h5py.File(fast_data_filename, \"r\") as infile:\n",
     "        if rawversion == 2:\n",
     "            count = np.squeeze(infile[f\"{h5path_idx_f}/count\"])\n",
     "            first = np.squeeze(infile[f\"{h5path_idx_f}/first\"])\n",