diff --git a/proposals/4230-animated-image-flag.md b/proposals/4230-animated-image-flag.md
index ebac9ca73..354e2d0c9 100644
--- a/proposals/4230-animated-image-flag.md
+++ b/proposals/4230-animated-image-flag.md
@@ -68,7 +68,7 @@ Problems'.
 
 ## Unstable prefix
 
-Until stable, the flag will be `org.matrix.animated`.
+Until stable, the flag will be `org.matrix.msc4230.animated`.
 
 ## Dependencies