diff --git a/content/client-server-api/modules/instant_messaging.md b/content/client-server-api/modules/instant_messaging.md
index 0b11156f..5b3124d2 100644
--- a/content/client-server-api/modules/instant_messaging.md
+++ b/content/client-server-api/modules/instant_messaging.md
@@ -101,7 +101,8 @@ structure.
 {{% boxes/note %}}
 {{% changed-in v="1.13" %}}
 In previous versions of the specification, [rich replies](#rich-replies) could
-use a special tag, `mx-reply`, this is no longer the case.
+use a special tag, `mx-reply`, this is no longer the case. Clients should strip
+this tag and its content.
 {{% /boxes/note %}}
 
 {{% boxes/note %}}