diff --git a/api/server-server/definitions/event-schemas/m.direct_to_device.yaml b/api/server-server/definitions/event-schemas/m.direct_to_device.yaml
index 12578f4d..7ab3b5d3 100644
--- a/api/server-server/definitions/event-schemas/m.direct_to_device.yaml
+++ b/api/server-server/definitions/event-schemas/m.direct_to_device.yaml
@@ -50,7 +50,7 @@ allOf:
             description: |-
               The contents of the messages to be sent.  These are arranged in
               a map of user IDs to a map of device IDs to message bodies.
-              The device ID may also be *, meaning all known devices for the user.
+              The device ID may also be \\*, meaning all known devices for the user.
             example: {
               "alice@example.org": {
                 "IWHQUZUIAH": {