diff --git a/lib/magpie/README_MOODLE.txt b/lib/magpie/README_MOODLE.txt
index be527fa2510..319cd7c9b25 100644
--- a/lib/magpie/README_MOODLE.txt
+++ b/lib/magpie/README_MOODLE.txt
@@ -15,4 +15,15 @@ Changes - see MDL-7045:
 Fixes not reported upstream yet.
 
 skodak
-16 October 2006
\ No newline at end of file
+16 October 2006
+=============================================================
+Bug fix - see MDL-18644
+
+Bug in function array_change_key_case(), using assignment (=) instead of
+equality (==).
+
+Reported upstream as bug #2705796
+
+David Mudrak (mudrd8mz)
+=============================================================
+