diff --git a/tests/auc/gen_ts_55_205_test_sets/pdftxt_2_c.py b/tests/auc/gen_ts_55_205_test_sets/pdftxt_2_c.py
index acc0f7d..b01a797 100755
--- a/tests/auc/gen_ts_55_205_test_sets/pdftxt_2_c.py
+++ b/tests/auc/gen_ts_55_205_test_sets/pdftxt_2_c.py
@@ -1,4 +1,4 @@
-#!/usr/bin/python
+#!/usr/bin/env python
 # FIXME: use python3 once buildslaves are updated.
 # Convert test sets pasted from 3GPP TS 55.205 to C code.