diff --git a/.gitignore b/.gitignore
index 7aa1928..fcfc9f2 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,4 +1,4 @@
-# SPDX-FileCopyrightText: Eric S. Raymond
+# SPDX-FileCopyrightText: (C) Eric S. Raymond
 # SPDX-License-Identifier: BSD-2-Clause
 advent
 *.gcda
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 6b6bd6d..b8f4b91 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -1,4 +1,4 @@
-# SPDX-FileCopyrightText: Eric S. Raymond
+# SPDX-FileCopyrightText: (C) Eric S. Raymond
 # SPDX-License-Identifier: BSD-2-Clause
 stages:
   - ci-build
diff --git a/.shipper b/.shipper
index d3ed58d..5e5904c 100644
--- a/.shipper
+++ b/.shipper
@@ -1,4 +1,4 @@
-#SPDX-FileCopyrightText: Eric S. Raymond
+#SPDX-FileCopyrightText: (C) Eric S. Raymond
 #SPDX-License-Identifier: BSD-2-Clause
 extralines="""
 <p>There is a <a href="http://esr.gitlab.io/open-adventure/coverage/">code coverage analysis</a> and a <a href="http://esr.gitlab.io/open-adventure/coverage/adventure.yaml.html">symbol coverage analysis</p>