diff --git a/lang/codegen/msg.c b/lang/codegen/msg.c
index 8e2770e..e1a63cb 100644
--- a/lang/codegen/msg.c
+++ b/lang/codegen/msg.c
@@ -123,7 +123,7 @@ static void serialise_selector(
 		struct ivy_token *arg
 			= b_unbox(struct ivy_token, it.entry, t_entry);
 
-		if (arg->t_type != IVY_TOK_IDENT) {
+		if (arg->t_type != IVY_TOK_IDENT && arg->t_type != IVY_TOK_LABEL) {
 			b_stringstream_addf(out, "0");
 			continue;
 		}