diff --git a/system_tests/state_fuzz_test.go b/system_tests/state_fuzz_test.go
index 6e5a825f5..2c1143548 100644
--- a/system_tests/state_fuzz_test.go
+++ b/system_tests/state_fuzz_test.go
@@ -41,7 +41,7 @@ func BuildBlock(
 	if lastBlockHeader != nil {
 		delayedMessagesRead = lastBlockHeader.Nonce.Uint64()
 	}
-	inboxMultiplexer := arbstate.NewInboxMultiplexer(inbox, delayedMessagesRead, nil, nil, arbstate.KeysetValidate)
+	inboxMultiplexer := arbstate.NewInboxMultiplexer(inbox, delayedMessagesRead, nil, arbstate.KeysetValidate)
 
 	ctx := context.Background()
 	message, err := inboxMultiplexer.Pop(ctx)