1diff --git a/duplicity-backup.sh b/duplicity-backup.sh
2index 4704817c22a8334cf942e7138b673352ee56a5ee..f5d91e17b66c627acc2ff27b536519187e7fdb0e 100755
3--- a/duplicity-backup.sh
4+++ b/duplicity-backup.sh
5@@ -373,7 +373,7 @@ get_source_file_size()
6 done
7 8 # if INCLIST is not set or empty, add ROOT to it to be able to calculate disk usage
9- if [ ! -z "$INCLIST" ]; then
10+ if [ -z "$INCLIST" ]; then
11 DUINCLIST=($ROOT)
12 else
13 DUINCLIST=$INCLIST