diff --git a/lib/src/RawEvent.dart b/lib/src/RawEvent.dart
index b6822e4..501c5a4 100644
--- a/lib/src/RawEvent.dart
+++ b/lib/src/RawEvent.dart
@@ -43,7 +43,7 @@ class RawEvent {
   /// The user who has sent this event if it is not a global account data event.
   final String senderId;
 
-  User get sender => room.states[senderId].asUser ?? User(senderId);
+  User get sender => room.states[senderId]?.asUser ?? User(senderId);
 
   /// The time this event has received at the server. May be null for events like
   /// account data.