diff --git a/tutorial/11_hextof_workflow_trXPS_energy_calibration_using_SB.ipynb b/tutorial/11_hextof_workflow_trXPS_energy_calibration_using_SB.ipynb
index 1c1e5b8f..3c89547c 100644
--- a/tutorial/11_hextof_workflow_trXPS_energy_calibration_using_SB.ipynb
+++ b/tutorial/11_hextof_workflow_trXPS_energy_calibration_using_SB.ipynb
@@ -399,9 +399,9 @@
     "ref_id = 1\n",
     "sp_44498.ec.biases = -1*np.array([-30.2,-31.4,-32.6,-33.6,-34.8])\n",
     "sp_44498.ec.peaks = np.expand_dims(data[peaks]['dldTimeSteps'].data,1)\n",
-    "sp_44498.ec.tof = data.dldTimeSteps.data\n",
+    "sp_44498.ec.tof = res_corr.dldTimeSteps.data\n",
     "\n",
-    "params=sp_44498.calibrate_energy_axis(\n",
+    "sp_44498.calibrate_energy_axis(\n",
     "    ref_id=ref_id,\n",
     "    ref_energy=ref_energy,\n",
     "    method=\"lmfit\",\n",