diff --git a/rfcs/text/0040-volume-device.md b/rfcs/text/0040-volume-device.md
index 1cc1e1223..f50f9addb 100644
--- a/rfcs/text/0040-volume-device.md
+++ b/rfcs/text/0040-volume-device.md
@@ -133,6 +133,8 @@ https://github.com/microsoft/mdatp-devicecontrol/blob/main/Removable%20Storage%2
 
 * Stage 0: https://github.com/elastic/ecs/pull/2201
 
+* Stage 1: https://github.com/elastic/ecs/pull/2229
+
 <!--
 * Stage 1: https://github.com/elastic/ecs/pull/NNN
 ...