diff --git a/macosx/ReadMe.md b/macosx/ReadMe.md
index 085c09c691b..fa9c13b1aff 100644
--- a/macosx/ReadMe.md
+++ b/macosx/ReadMe.md
@@ -228,7 +228,7 @@ build)*:
 
 `--x-includes=/usr/X11R6/include --x-libraries=/usr/X11R6/lib`
 
-To install the new Python GUI (see [REQUIREMENTS.html](../REQUIREMENTS.html)
+To install the new Python GUI (see [REQUIREMENTS.md](../REQUIREMENTS.md)
 and [gui/wxpython/README](../gui/wxpython/README), wxpython installer
 available at [wxpython.org](https://wxpython.org/)), add this to configure (fill
 in the correct version at x.x.x.x for the wxpython you have installed):