diff --git a/peft_docs/en/clm-prompt-tuning.ipynb b/peft_docs/en/clm-prompt-tuning.ipynb
index 205ccc51..c235d2a1 100644
--- a/peft_docs/en/clm-prompt-tuning.ipynb
+++ b/peft_docs/en/clm-prompt-tuning.ipynb
@@ -197,7 +197,7 @@
     "        model_inputs[\"attention_mask\"][i] = [0] * (max_length - len(sample_input_ids)) + model_inputs[\n",
     "            \"attention_mask\"\n",
     "        ][i]\n",
-    "        labels[\"input_ids\"][i] = [-100] * (max_length - len(sample_input_ids)) + label_input_ids\n",
+    "        labels[\"input_ids\"][i] = [-100] * (max_length - len(label_input_ids)) + label_input_ids\n",
     "        model_inputs[\"input_ids\"][i] = torch.tensor(model_inputs[\"input_ids\"][i][:max_length])\n",
     "        model_inputs[\"attention_mask\"][i] = torch.tensor(model_inputs[\"attention_mask\"][i][:max_length])\n",
     "        labels[\"input_ids\"][i] = torch.tensor(labels[\"input_ids\"][i][:max_length])\n",