diff --git a/src/main.c b/src/main.c
index 70d0266378563659c07b32f945de019ec39353d8..b9f2de959258c5f59f88d8bb5a1b738f18310e68 100644
--- a/src/main.c
+++ b/src/main.c
@@ -1,6 +1,6 @@
 /* main.c
  *
- * Copyright © 2012, 2016-2018 Bruce Cowan <bruce@bcowan.eu>
+ * Copyright 2012, 2016-2018 Bruce Cowan <bruce@bcowan.eu>
  *
  * This file is free software; you can redistribute it and/or modify it
  * under the terms of the GNU Lesser General Public License as
@@ -14,6 +14,8 @@
  *
  * You should have received a copy of the GNU General Public License
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * SPDX-License-Identifier: LGPL-3.0-or-later
  */
 
 #include <gtk/gtk.h>
diff --git a/src/rugby-app-window.c b/src/rugby-app-window.c
index 89da10028c8ca6ca57f4f79954a76c7436129677..fe88f838602b74453e2af7e6ca32443bf875eba6 100644
--- a/src/rugby-app-window.c
+++ b/src/rugby-app-window.c
@@ -1,6 +1,6 @@
 /* rugby-app-window.c
  *
- * Copyright © 2017-2018 Bruce Cowan <bruce@bcowan.eu>
+ * Copyright 2017-2018 Bruce Cowan <bruce@bcowan.eu>
  *
  * This file is free software; you can redistribute it and/or modify it
  * under the terms of the GNU Lesser General Public License as
@@ -14,6 +14,8 @@
  *
  * You should have received a copy of the GNU General Public License
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * SPDX-License-Identifier: LGPL-3.0-or-later
  */
 
 #include <gtk/gtk.h>
diff --git a/src/rugby-app-window.h b/src/rugby-app-window.h
index b9ac69cbd6ad5cf5d535564a5d38194f8197c1f3..9c824dab67ea435940f2a61cd4889a6c669cf3cb 100644
--- a/src/rugby-app-window.h
+++ b/src/rugby-app-window.h
@@ -1,6 +1,6 @@
 /* rugby-app-window.h
  *
- * Copyright © 2017 Bruce Cowan <bruce@bcowan.eu>
+ * Copyright 2017 Bruce Cowan <bruce@bcowan.eu>
  *
  * This file is free software; you can redistribute it and/or modify it
  * under the terms of the GNU Lesser General Public License as
@@ -14,6 +14,8 @@
  *
  * You should have received a copy of the GNU General Public License
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * SPDX-License-Identifier: LGPL-3.0-or-later
  */
 
 #pragma once
diff --git a/src/rugby-possibility-widget.c b/src/rugby-possibility-widget.c
index 1c1db86967afd9b7c3f92de0d0808d0fe2dfb8db..d9725d86fc0e9ae4cfa0e0f7441ab358b5f2b6ac 100644
--- a/src/rugby-possibility-widget.c
+++ b/src/rugby-possibility-widget.c
@@ -1,3 +1,23 @@
+/* rugby-possibility-widget.c
+ *
+ * Copyright 2018 Bruce Cowan <bruce@bcowan.eu>
+ *
+ * This file is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as
+ * published by the Free Software Foundation; either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This file is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * SPDX-License-Identifier: LGPL-3.0-or-later
+ */
+
 #include "rugby-possibility-widget.h"
 
 struct _RugbyPossibilityWidget
diff --git a/src/rugby-possibility-widget.h b/src/rugby-possibility-widget.h
index 44943e2fa3f0745e2bd6adb0908719dcdb97ada9..f96b202094a31e970052943ee51fa90dfaf133cb 100644
--- a/src/rugby-possibility-widget.h
+++ b/src/rugby-possibility-widget.h
@@ -1,6 +1,6 @@
 /* rugby-possibility-widget.h
  *
- * Copyright © 2018 Bruce Cowan <bruce@bcowan.eu>
+ * Copyright 2018 Bruce Cowan <bruce@bcowan.eu>
  *
  * This file is free software; you can redistribute it and/or modify it
  * under the terms of the GNU Lesser General Public License as
@@ -14,6 +14,8 @@
  *
  * You should have received a copy of the GNU General Public License
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * SPDX-License-Identifier: LGPL-3.0-or-later
  */
 
 #pragma once
diff --git a/src/rugby-possibility.c b/src/rugby-possibility.c
index 9b4bd23e1bce2b1541e2bba70fc21eaf153a16e7..3a701963574846b617205a9f0b7ae6403b5082c5 100644
--- a/src/rugby-possibility.c
+++ b/src/rugby-possibility.c
@@ -1,6 +1,6 @@
 /* rugby-possibility.c
  *
- * Copyright © 2018 Bruce Cowan <bruce@bcowan.eu>
+ * Copyright 2018 Bruce Cowan <bruce@bcowan.eu>
  *
  * This file is free software; you can redistribute it and/or modify it
  * under the terms of the GNU Lesser General Public License as
@@ -14,6 +14,8 @@
  *
  * You should have received a copy of the GNU General Public License
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * SPDX-License-Identifier: LGPL-3.0-or-later
  */
 
 #include "rugby-possibility.h"
diff --git a/src/rugby-possibility.h b/src/rugby-possibility.h
index be405fbf2e3f9cc1377f238109fe567f81ec018e..f99c3bb7bdce97092013774f5dd7bdf10b51815e 100644
--- a/src/rugby-possibility.h
+++ b/src/rugby-possibility.h
@@ -1,6 +1,6 @@
 /* rugby-possibility.h
  *
- * Copyright © 2018 Bruce Cowan <bruce@bcowan.eu>
+ * Copyright 2018 Bruce Cowan <bruce@bcowan.eu>
  *
  * This file is free software; you can redistribute it and/or modify it
  * under the terms of the GNU Lesser General Public License as
@@ -14,6 +14,8 @@
  *
  * You should have received a copy of the GNU General Public License
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * SPDX-License-Identifier: LGPL-3.0-or-later
  */
 
 #pragma once