diff --git a/chapter01/changelog.xml b/chapter01/changelog.xml
index 37e7f0d50..d9d9f0f8e 100644
--- a/chapter01/changelog.xml
+++ b/chapter01/changelog.xml
@@ -50,6 +50,10 @@
[pierre] - Update to meson-0.61.1. Fixes
#4985.
+
+ [thomas] - Upgrade ISL-0.24, change download location and
+ fix usage in the final gcc.
+