diff --git a/calc_wer.py b/calc_wer.py
index 914d720..8e23f4a 100644
--- a/calc_wer.py
+++ b/calc_wer.py
@@ -31,7 +31,7 @@ for line in sys.stdin:
 srr = correct_sentences/len(wer_list)
 wer_all = wer(sum(correct), sum(substitution), sum(deletions), sum(insertions))
 
-data = pd.read_csv(FILE_NAME, sep='\t', header=False)
+data = pd.read_csv(FILE_NAME, sep='\t', header=None)
 df = pd.DataFrame(data)
 print(len(wer_list), len(data))
 df.insert(4, '', wer_list)