diff --git a/notebooks/ePix100/Correction_ePix100_NBC.ipynb b/notebooks/ePix100/Correction_ePix100_NBC.ipynb
index 5df60c846b275c190a4352d5dcd1e8caec6ffa7c..878edb18e2346902e08fe6d2d56be7176afff197 100644
--- a/notebooks/ePix100/Correction_ePix100_NBC.ipynb
+++ b/notebooks/ePix100/Correction_ePix100_NBC.ipynb
@@ -242,7 +242,7 @@
     "\n",
     "# update conditions with illuminated conditins.\n",
     "cond_dict.update({\n",
-    "        \"photon_energy\": photon_energy\n",
+    "        \"photon_energy\": gain_photon_energy\n",
     "    })\n",
     "\n",
     "illum_condition = Conditions.Illuminated.ePix100(**cond_dict)\n",