diff --git a/vala/long_double/test128float.vala b/vala/long_double/test128float.vala
index f2107fa..2fa5102 100644
--- a/vala/long_double/test128float.vala
+++ b/vala/long_double/test128float.vala
@@ -14,4 +14,11 @@ void main () {
 	stdout.printf ("Double128: ld = %e, ", ld);
 	ld += 1; ld -= 1;
 	stdout.printf ("(+-1) ld = %e\n", ld);
+
+	ld = 1.234567;
+	stdout.printf ("ld = %e, ", ld);
+	d = ld; stdout.printf ("d = ld, ");
+	stdout.printf ("d = %e, ", d);
+	ld = d; stdout.printf ("ld = d, ");
+	stdout.printf ("ld = %e\n", ld);
 }