diff --git a/doc/_notebooks/waveform.ipynb b/doc/_notebooks/waveform.ipynb
index c381fc7c6924991490bf0d40186e425e653f7ab5..585bc7e9bed4c1c3c1f2168f092ef940fd6cb7bc 100644
--- a/doc/_notebooks/waveform.ipynb
+++ b/doc/_notebooks/waveform.ipynb
@@ -189,7 +189,7 @@
     "w_stereo = Waveform(x_stereo, mask=mask_stereo, fs=1)\n",
     "\n",
     "w_plot = w_stereo.plot()\n",
-    "legend(iter(w_plot), ('left', 'right'))\n",
+    "legend(w_plot, ('left', 'right'))\n",
     "print(w_stereo)"
    ]
   },