diff --git a/wally-pipelined/testgen/testgen-PIPELINE.py b/wally-pipelined/testgen/testgen-PIPELINE.py
old mode 100644
new mode 100755
index f05294db0..00d686c89
--- a/wally-pipelined/testgen/testgen-PIPELINE.py
+++ b/wally-pipelined/testgen/testgen-PIPELINE.py
@@ -1,3 +1,4 @@
+#!/usr/bin/python
 
 import numpy as np
 import string
@@ -632,4 +633,4 @@ for xlen in xlens:
     f.close()
     r.close()
 
-    print("Done with ", xlen)
\ No newline at end of file
+    print("Done with ", xlen)