diff --git a/ccollect.sh b/ccollect.sh
index 7f5ae67..7c41352 100755
--- a/ccollect.sh
+++ b/ccollect.sh
@@ -285,7 +285,7 @@ while [ "${i}" -lt "${no_sources}" ]; do
    c_pre_exec="${backup}/pre_exec"
    c_post_exec="${backup}/post_exec"
    for opt in exclude verbose very_verbose rsync_options summary delete_incomplete \
-         remote_host rsync_failure_codes ; do
+         remote_host rsync_failure_codes mtime ; do
       if [ -f "${backup}/$opt" -o -f "${backup}/no_$opt"  ]; then
          eval c_$opt=\"${backup}/$opt\"
       else
@@ -293,6 +293,13 @@ while [ "${i}" -lt "${no_sources}" ]; do
       fi
    done
 
+   #
+   # With mtime option, sort backup directories with mtime (default is ctime)
+   #
+   if [ -f "$c_mtime" ] ; then
+      TSORT="t"
+   fi
+
    #
    # Marking backups: If we abort it's not removed => Backup is broken
    #
@@ -496,9 +503,6 @@ while [ "${i}" -lt "${no_sources}" ]; do
    #
    # Check for backup directory to clone from: Always clone from the latest one!
    #
-   # Use ls -1c instead of -1t, because last modification maybe the same on all
-   # and metadate update (-c) is updated by rsync locally.
-   #
    last_dir="$(pcmd ls -${TSORT}p1 "${ddir}" | grep '/$' | head -n 1)" || \
       _exit_err "Failed to list contents of ${ddir}."
    
diff --git a/doc/ccollect.text b/doc/ccollect.text
index 3d9c480..9781387 100644
--- a/doc/ccollect.text
+++ b/doc/ccollect.text
@@ -360,6 +360,7 @@ Additionally a source may have the following files:
    - `delete_incomplete`   delete incomplete backups
    - `remote_host`         host to backup to
    - `rsync_failure_codes` list of rsync exit codes that indicate complete failure
+   - `mtime`               Sort backup directories based on their modification time
 
 
 Example:
@@ -584,6 +585,18 @@ be left in the destination directory indicating failure of this backup.  If
 you have enabled delete_incomplete, then this backup will be deleted during
 the next ccollect run on the same interval.
 
+mtime
+^^^^^
+By default, ccollect.sh chooses the most recent backup directory for cloning or
+the oldest for deletion based on the directory's last change time (ctime).
+With this option, the sorting is done based on modification time (mtime).  With
+this version of ccollect.sh, the ctime and mtime of your backups will normally
+be the same and this option has no effect.  However, if you, for example, move
+your backups to another hard disk using cp -a or rsync -a, you should use this
+option because the ctimes are not preserved during such operations.
+
+If you have any backups in your repository made with ccollect version 0.7.1 or
+earlier, do not use this option and do not move your repository.
 
 Hints
 -----