diff --git a/doc/_notebooks/waveform.ipynb b/doc/_notebooks/waveform.ipynb
index 4e9b6b93bc4514f444e02628c6bfa1b27f999df3..33a68e95b34974beec692dad67b896650e0f82fa 100644
--- a/doc/_notebooks/waveform.ipynb
+++ b/doc/_notebooks/waveform.ipynb
@@ -639,7 +639,7 @@
     "eps64=np.finfo(np.float64).eps * 4\n",
     "print(eps16, eps32, eps64)\n",
     "\n",
-    "w_float16 = Waveform(np.cos(2*np.pi*f0*t).astype(np.float16) * eps16 + 1 , fs=fs)\n",
+    "w_float16 = Waveform(np.cos(2*np.pi*f0*t).astype(np.float16) * eps16 + 1, fs=fs)\n",
     "w_float32 = Waveform(np.cos(2*np.pi*f0*t).astype(np.float32) * eps32 + 1, fs=fs)\n",
     "w_float64 = Waveform(np.cos(2*np.pi*f0*t).astype(np.float64) * eps64 + 1, fs=fs)\n",
     "\n",