diff --git a/notebooks/ePix100/Characterize_Darks_ePix100_NBC.ipynb b/notebooks/ePix100/Characterize_Darks_ePix100_NBC.ipynb
index a4573a687a0adea53a3f197d6ef77d37e55cb8de..40b1bf12ab076f679bd4d7c2210a734df41c99b9 100644
--- a/notebooks/ePix100/Characterize_Darks_ePix100_NBC.ipynb
+++ b/notebooks/ePix100/Characterize_Darks_ePix100_NBC.ipynb
@@ -88,6 +88,7 @@
     "from XFELDetAna.plotting.util import prettyPlotting\n",
     "from cal_tools.enums import BadPixels\n",
     "from cal_tools.step_timing import StepTimer\n",
+    "from cal_tools.epix100 import epix100lib\n",
     "from cal_tools.tools import (\n",
     "    get_dir_creation_date,\n",
     "    get_pdu_from_db,\n",