diff --git a/tools/add_ccollect_source.sh b/tools/add_ccollect_source.sh
index d9ae8a8..7a238f5 100755
--- a/tools/add_ccollect_source.sh
+++ b/tools/add_ccollect_source.sh
@@ -4,6 +4,7 @@
 # Written for Netstream (www.netstream.ch)
 # Creates a source from standard values specified in
 # /etc/ccollect/defaults/sources
+# Copying: GPLv3
 
 # standard values
 CCOLLECT_CONF="${CCOLLECT_CONF:-/etc/ccollect}"
diff --git a/tools/delete_ccollect_source.sh b/tools/delete_ccollect_source.sh
index b1acb24..8a811d3 100755
--- a/tools/delete_ccollect_source.sh
+++ b/tools/delete_ccollect_source.sh
@@ -3,6 +3,7 @@
 # 2007-08-16
 # Written for Netstream (www.netstream.ch)
 # Delete sources and their backups (optionally).
+# Copying: GPLv3 (See file COPYING in top directory)
 
 # standard values
 CCOLLECT_CONF="${CCOLLECT_CONF:-/etc/ccollect}"
diff --git a/tools/list_ccollect_intervals.sh b/tools/list_ccollect_intervals.sh
index 2d51688..47c1481 100755
--- a/tools/list_ccollect_intervals.sh
+++ b/tools/list_ccollect_intervals.sh
@@ -3,6 +3,7 @@
 # Nico Schottelius <nico-ccollect //@// schottelius.org>
 # Date: 24-Jun-2006
 # Last Modified: -
+# Copying: GPLv3 (See file COPYING in top directory)
 #
 
 CCOLLECT_CONF=${CCOLLECT_CONF:-/etc/ccollect}