diff --git a/event/type.go b/event/type.go
index 3f01a067..5035f2fa 100644
--- a/event/type.go
+++ b/event/type.go
@@ -239,6 +239,7 @@ var (
 
 	EventUnstablePollStart    = Type{Type: "org.matrix.msc3381.poll.start", Class: MessageEventType}
 	EventUnstablePollResponse = Type{Type: "org.matrix.msc3381.poll.response", Class: MessageEventType}
+	EventUnstablePollEnd      = Type{Type: "org.matrix.msc3381.poll.end", Class: MessageEventType}
 )
 
 // Ephemeral events