diff --git a/newlib/doc/chapter-texi2docbook.py b/newlib/doc/chapter-texi2docbook.py
index e21489b9a..1a7803091 100755
--- a/newlib/doc/chapter-texi2docbook.py
+++ b/newlib/doc/chapter-texi2docbook.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 #
 # python script to convert the handwritten chapter .texi files, which include
 # the generated files for each function, to DocBook XML