diff --git a/examples/tutorial_3_LUPA.ipynb b/examples/tutorial_3_LUPA.ipynb
index a9a93dbce..4cd34c1bc 100644
--- a/examples/tutorial_3_LUPA.ipynb
+++ b/examples/tutorial_3_LUPA.ipynb
@@ -1143,8 +1143,7 @@
     "# Torque\n",
     "pto_tdom.sel(realization=0).force.plot(\n",
     "    ax=ax_res1[2], linestyle='solid', color='black', label='PTO trq.')\n",
-    "pto_rms_tq = np.sqrt(np.mean(pto_tdom.sel(realization=0).force.values**2)\n",
-    "                     / pto_tdom.sel(realization=0).time.values[-1])\n",
+    "pto_rms_tq = np.sqrt(np.mean(pto_tdom.sel(realization=0).force.values**2))\n",
     "ax_res1[2].plot(\n",
     "    pto_tdom.sel(realization=0).time, pto_rms_tq *\n",
     "    np.ones(pto_tdom.sel(realization=0).time.shape),\n",