diff --git a/scripts/writegtf.py b/scripts/writegtf.py
index d5136a79940666ac4f7e9368b687c83bb011a3e9..9a8c7a8a7bbafbf7191f679c1a4d654f1ba9e9b9 100644
--- a/scripts/writegtf.py
+++ b/scripts/writegtf.py
@@ -1,6 +1,7 @@
 import pandas as pd
 import numpy as np
 import argparse
+import re
 
 def transcript_ID_finder (entry):
     index_transcript_id = entry.find("transcript_id")