diff --git a/src/Tools/freecad-thumbnailer.in b/src/Tools/freecad-thumbnailer.in
index 641c9f97d4..0a6fe451cd 100644
--- a/src/Tools/freecad-thumbnailer.in
+++ b/src/Tools/freecad-thumbnailer.in
@@ -1,4 +1,4 @@
-#!/usr/bin/python
+#!/usr/bin/python3
 """Support file to show FreeCAD thumbnails on Free Desktop Environments (like GNOME or KDE)
 
 Installation: