diff --git a/backup.sh b/backup.sh
index 6b1806b..fce154a 100755
--- a/backup.sh
+++ b/backup.sh
@@ -262,6 +262,8 @@ while :; do
         ;;
         -d)
             BG_DEBUG_MODE=TRUE
+            ZFS_SEND_OPTS="$ZFS_SEND_OPTS -v"
+            ZFS_RECV_OPTS="$ZFS_RECV_OPTS -v"
             echo Debug mode.
         ;;
         --) shift; break ;;