diff --git a/HACKING b/HACKING
index bc85acc5..3980f560 100644
--- a/HACKING
+++ b/HACKING
@@ -66,7 +66,7 @@ requires in a packaged distribution.  Programs required:
   * m4
   * gettext
   * make (GNU preferred)
-  * bison
+  * Python
   * gcc
 
 To rebuild the manpages from the DocBook XML files, the program "xmlto" and