diff --git a/notebooks/long_form_generation.ipynb b/notebooks/long_form_generation.ipynb
index e4ce61e0..d51e0f0c 100644
--- a/notebooks/long_form_generation.ipynb
+++ b/notebooks/long_form_generation.ipynb
@@ -191,7 +191,7 @@
    "source": [
     "GEN_TEMP = 0.6\n",
     "SPEAKER = \"v2/en_speaker_6\"\n",
-    "silence = np.zeros(int(0.25 * SAMPLE_RATE))  # quarter second of silence\n",
+    "silence = np.zeros(int(0.25 * SAMPLE_RATE), dtype=np.int16 )  # quarter second of silence\n",
     "\n",
     "pieces = []\n",
     "for sentence in sentences:\n",