diff --git a/rc.d/rc.firewall b/rc.d/rc.firewall
index ae62580..d86171d 100755
--- a/rc.d/rc.firewall
+++ b/rc.d/rc.firewall
@@ -1,4 +1,8 @@
 #!/bin/bash
+# Version: 0.2.0
+# Copyright (c) 2022:
+#   Darren 'Tadgy' Austin <darren (at) afterdark.org.uk>
+# Licensed under the terms of the GNU General Public License version 3.
 
 # The name of the main external interface.
 EX_IF="eth0"
@@ -150,7 +154,7 @@ case "$1" in
       start_firewall
     ;;
   *)
-    echo "Usage: $BASH_SOURCE <start|stop|restart>" >&2
+    echo "Usage: ${BASH_SOURCE[0]} <start|stop|restart>" >&2
     exit 1
     ;;
 esac
diff --git a/rc.d/rc.firewall-complete b/rc.d/rc.firewall-complete
index 456182c..4cfb921 100755
--- a/rc.d/rc.firewall-complete
+++ b/rc.d/rc.firewall-complete
@@ -1,4 +1,8 @@
 #!/bin/bash
+# Version: 0.2.0
+# Copyright (c) 2022:
+#   Darren 'Tadgy' Austin <darren (at) afterdark.org.uk>
+# Licensed under the terms of the GNU General Public License version 3.
 
 # The name of the main external interface.
 EX_IF="eth0"
@@ -202,7 +206,7 @@ case "$1" in
       start_firewall
     ;;
   *)
-    echo "Usage: $BASH_SOURCE <start|stop|restart>" >&2
+    echo "Usage: ${BASH_SOURCE[0]} <start|stop|restart>" >&2
     exit 1
     ;;
 esac
diff --git a/rc.d/rc.firewall-float b/rc.d/rc.firewall-float
index ca76259..ed5cc00 100755
--- a/rc.d/rc.firewall-float
+++ b/rc.d/rc.firewall-float
@@ -1,4 +1,8 @@
 #!/bin/bash
+# Version: 0.2.0
+# Copyright (c) 2022:
+#   Darren 'Tadgy' Austin <darren (at) afterdark.org.uk>
+# Licensed under the terms of the GNU General Public License version 3.
 
 # The name of the main external interface.
 EX_IF="eth0"
@@ -184,7 +188,7 @@ case "$1" in
       start_firewall
     ;;
   *)
-    echo "Usage: $BASH_SOURCE <start|stop|restart>" >&2
+    echo "Usage: ${BASH_SOURCE[0]} <start|stop|restart>" >&2
     exit 1
     ;;
 esac