diff --git a/notebooks/AGIPD/Characterize_AGIPD_Gain_Darks_NBC.ipynb b/notebooks/AGIPD/Characterize_AGIPD_Gain_Darks_NBC.ipynb
index 44987c67bd6bdd95f0ea631e910fe5c60f582f64..23a1bd6b295594cba1463506669edee7f036940b 100644
--- a/notebooks/AGIPD/Characterize_AGIPD_Gain_Darks_NBC.ipynb
+++ b/notebooks/AGIPD/Characterize_AGIPD_Gain_Darks_NBC.ipynb
@@ -568,7 +568,7 @@
     "                                  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)"
    ]
   },
   {