diff --git a/make-no-dlcompat-tarball.sh b/make-no-dlcompat-tarball.sh
index 0f2239a..3ba7b5a 100755
--- a/make-no-dlcompat-tarball.sh
+++ b/make-no-dlcompat-tarball.sh
@@ -1,4 +1,7 @@
 #!/bin/bash -e
+#
+#  See ftp://ftp.andrew.cmu.edu/pub/cyrus-mail/ for unmodified sources.
+#
 
 tmppath=`mktemp -d ${TMPDIR:-/tmp}/make-no-dlcompat-tarball-XXXXXX`
 if test -z "$tmppath" ; then