diff --git a/ngrams/term_frequencies.py b/ngrams/term_frequencies.py
index f941d1a..28529dc 100755
--- a/ngrams/term_frequencies.py
+++ b/ngrams/term_frequencies.py
@@ -63,7 +63,7 @@ def my_tokenizer(text, mwe_pass, mwe_tokenize, stopWords, ngram_output):
             if random() <= 0.1:
                 grams = list(chain(*map(lambda i : ngrams(sentence,i),range(4))))
                 Path(ngram_output).mkdir(parents=True, exist_ok=True)
-                with open(ngram_output','a') as gram_file:
+                with open(ngram_output,'a') as gram_file:
                     for ng in grams:
                         gram_file.write(' '.join(ng) + '\n')
             for token in sentence: