diff --git a/notebooks/08-tdem/fwd_tdem_1d.ipynb b/notebooks/08-tdem/fwd_tdem_1d.ipynb
index 36cad32..5455b94 100644
--- a/notebooks/08-tdem/fwd_tdem_1d.ipynb
+++ b/notebooks/08-tdem/fwd_tdem_1d.ipynb
@@ -212,6 +212,7 @@
     "    tdem.sources.CircularLoop(\n",
     "        receiver_list=receiver_list,\n",
     "        location=source_location,\n",
+    "        orientation=source_orientation,\n",
     "        waveform=stepoff_waveform,\n",
     "        current=source_current,\n",
     "        radius=source_radius,\n",
diff --git a/notebooks/08-tdem/inv_tdem_1d.ipynb b/notebooks/08-tdem/inv_tdem_1d.ipynb
index 63b6b63..78373b9 100644
--- a/notebooks/08-tdem/inv_tdem_1d.ipynb
+++ b/notebooks/08-tdem/inv_tdem_1d.ipynb
@@ -290,6 +290,7 @@
     "    tdem.sources.CircularLoop(\n",
     "        receiver_list=receiver_list,\n",
     "        location=source_location,\n",
+    "        orientation=source_orientation,\n",
     "        waveform=waveform,\n",
     "        current=source_current,\n",
     "        radius=source_radius,\n",