diff --git a/changelogs/identity_service/newsfragments/3167.clarification b/changelogs/identity_service/newsfragments/3167.clarification
index 9f68bbf2..16ed8dcd 100644
--- a/changelogs/identity_service/newsfragments/3167.clarification
+++ b/changelogs/identity_service/newsfragments/3167.clarification
@@ -1 +1 @@
-Clarify that some identifiers may be case-folded to lowercase prior to processing, as per [MSC2265](https://github.com/matrix-org/matrix-doc/pull/2265).
\ No newline at end of file
+Clarify that some identifiers must be case folded prior to processing, as per [MSC2265](https://github.com/matrix-org/matrix-doc/pull/2265).