diff --git a/backup-tar/backup.sh b/backup-tar/backup.sh
index c36972d73219accb15f6e280f4612b0eb99c78fa..c6ed2e1853b39331ddc6af2959ca63a0cd332f03 100755
--- a/backup-tar/backup.sh
+++ b/backup-tar/backup.sh
@@ -34,21 +34,21 @@ get_snars() { find $1/ -type f -name '*.snar' -printf '%f\n' | sort; }
 get_type() {
     mkdir -p "$1"
 
-	if ! ls $1/*.snar >&/dev/null; then
-		echo full
-	else
-		LAST_FULL=$(date --date=$(get_snars $1 | grep full | tail -n1 | sed 's/[.].*$//') +%s)
-		LAST_BIG=$(date --date=$(get_snars $1 | grep '\(full\|weekly\)' | tail -n1 | sed 's/[.].*$//') +%s)
-		NOW=$(date +%s)
-		# do a full backup every 8 weeks
-		if [[ $(($NOW - $LAST_FULL)) -ge $((3600 * 24 * 7 * 8)) ]]; then
-			echo full
-		elif [[ $(($NOW - $LAST_BIG)) -ge $((3600 * 24 * 7)) ]]; then
-			echo weekly
-		else
-			echo daily
-		fi
-	fi
+    if ! ls $1/*.snar >&/dev/null; then
+        echo full
+    else
+        LAST_FULL=$(date --date=$(get_snars $1 | grep full | tail -n1 | sed 's/[.].*$//') +%s)
+        LAST_BIG=$(date --date=$(get_snars $1 | grep '\(full\|weekly\)' | tail -n1 | sed 's/[.].*$//') +%s)
+        NOW=$(date +%s)
+        # do a full backup every 8 weeks
+        if [[ $(($NOW - $LAST_FULL)) -ge $((3600 * 24 * 7 * 8)) ]]; then
+            echo full
+        elif [[ $(($NOW - $LAST_BIG)) -ge $((3600 * 24 * 7)) ]]; then
+            echo weekly
+        else
+            echo daily
+        fi
+    fi
 }
 
 for SRC in $SOURCES; do