diff --git a/bin/1.2_filter_motifs/tfbsscan.py b/bin/1.2_filter_motifs/tfbsscan.py
index f17ebf6..a9e204b 100644
--- a/bin/1.2_filter_motifs/tfbsscan.py
+++ b/bin/1.2_filter_motifs/tfbsscan.py
@@ -1,3 +1,5 @@
+#!/usr/bin/env python
+
 """
 TFBSscan.py produces the data to be used to join the footprint and motif information across genome