diff --git a/notebooks/AGIPD/Characterize_AGIPD_Gain_Darks_NBC.ipynb b/notebooks/AGIPD/Characterize_AGIPD_Gain_Darks_NBC.ipynb
index eae874835411b361047e4af684e906bcbb2788d3..e44b990c1d5d034210a648a70adc9f01785d8811 100644
--- a/notebooks/AGIPD/Characterize_AGIPD_Gain_Darks_NBC.ipynb
+++ b/notebooks/AGIPD/Characterize_AGIPD_Gain_Darks_NBC.ipynb
@@ -567,7 +567,7 @@
     "                                  bias_voltage=bias_voltage,\n",
     "                                  acquisition_rate=acq_rate,\n",
     "                                  gain_setting=gain_setting,\n",
-    "                                  gain_mode=(True if fixed_gain_mode else None))"
+    "                                  gain_mode=fixed_gain_mode)"
    ]
   },
   {