diff --git a/test_regress/t/t_incr_void.v b/test_regress/t/t_incr_void.v
index eebf410aa..75284fcd7 100644
--- a/test_regress/t/t_incr_void.v
+++ b/test_regress/t/t_incr_void.v
@@ -1,3 +1,9 @@
+// DESCRIPTION: Verilator: Verilog Test module
+//
+// This file ONLY is placed under the Creative Commons Public Domain, for
+// any use, without warranty, 2023 by Drew Ranck.
+// SPDX-License-Identifier: CC0-1.0
+
 module t
   (/*AUTOARG*/
    // Inputs