diff --git a/lib/lessphp/moodle_readme.txt b/lib/lessphp/moodle_readme.txt
index 95ea15ae0c4..115379dfe4d 100644
--- a/lib/lessphp/moodle_readme.txt
+++ b/lib/lessphp/moodle_readme.txt
@@ -12,3 +12,6 @@ Also copy the license file from the project root.
 
 Licensed under the Apache license 2.0.
 
+Modifications:
+* MDL-62294 - Cherry-picked upstream commit to fix PHP 7.2 compatibility when counting ruleset rules.
+    https://github.com/oyejorge/less.php/commit/669acc51817a8da162b5f1b7137e79f0e4acc636