diff --git a/ccollect.sh b/ccollect.sh
index b798fe1..6cbca47 100755
--- a/ccollect.sh
+++ b/ccollect.sh
@@ -225,6 +225,7 @@ while [ "$i" -lt "$no_sources" ]; do
    c_vverbose="$backup/very_verbose"
    c_rsync_extra="$backup/rsync_options"
    c_summary="$backup/summary"
+
    c_incomplete="$backup/incomplete_remove"
 
    c_pre_exec="$backup/pre_exec"
@@ -405,7 +406,7 @@ while [ "$i" -lt "$no_sources" ]; do
 
    #
    # FIXME: add marking here
-   # touch c_marker
+   # touch $c_marker
    #
 
    #
diff --git a/doc/ccollect.text b/doc/ccollect.text
index d11814c..d1741e2 100644
--- a/doc/ccollect.text
+++ b/doc/ccollect.text
@@ -537,6 +537,22 @@ use a link to
 
 The only requirement is that it is executable.
 
+
+Using source specific interval definitions
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+When you are backing up multiple hosts via cron each night, it may be
+a problem that host "big_server" may only have 4 daily backups, because
+otherwise its backup device will be full. But for all other hosts
+you want to keep 20 daily backups. In this case you would create
+`/etc/ccollect/default/intervals/daily` containing "20" and
+`/etc/ccollect/sources/big_server/intervals/daily` containing "4".
+
+Source specific intervals always overwrite the default values.
+If you have to specify it individually for every host, because
+of different requirements, you can even omit creating
+`/etc/ccollect/default/intervals/daily`.
+
+
 F.A.Q.
 ------