diff --git a/lib/phpmailer/README_MOODLE.txt b/lib/phpmailer/README_MOODLE.txt
index 57d158c95da..eccefa6f9da 100644
--- a/lib/phpmailer/README_MOODLE.txt
+++ b/lib/phpmailer/README_MOODLE.txt
@@ -9,3 +9,7 @@ class.pop3.php
 docs/
 examples/
 test/
+
+Our changes:
+ * Modified EncodeQP() to not use php's implementation of quoted printable encoding as it was causing problems for some users MDL-23240
+