diff --git a/backup.sh b/backup.sh
index 7d7a711..9499d33 100755
--- a/backup.sh
+++ b/backup.sh
@@ -171,6 +171,10 @@ send_latest()
         for dataset in $SEND_DATASETS; do
             dataset=`echo $dataset|cut -d':' -f1`
             remote_dataset=`echo $dataset|cut -d':' -f2`
+            if [ $BG_DEBUG_MODE = "TRUE" ]; then
+                echo dataset: $dataset
+                echo remote dataset: $remote_dataset
+            fi
             origin_snapshot=`get_latest_snapshot $dataset`
             if [ $BG_TEST_MODE = "TRUE" ]; then
                 echo zfs send $ZFS_SEND_OPTS $dataset@$origin_snapshot  \| \
@@ -237,6 +241,10 @@ while :; do
             BG_TEST_MODE=TRUE
             echo Test mode.
         ;;
+        -d)
+            BG_DEBUG_MODE=TRUE
+            echo Debug mode.
+        ;;
         --) shift; break ;;
     esac
     shift