1diff --git a/duplicity-backup.sh b/duplicity-backup.sh
2index f658dfbcb5f6714e048b92d3c0eb34ba07460378..5dcae5ede587a59cf0c09b483ea3157a47da8e8c 100644
3--- a/duplicity-backup.sh
4+++ b/duplicity-backup.sh
5@@ -471,7 +471,7 @@ get_remote_file_size()
6 ;;
7 esac
8 9- if $FRIENDLY_TYPE_NAME ; then
10+ if [[ $FRIENDLY_TYPE_NAME ]] ; then
11 echo -e ""$SIZE"\t"$FRIENDLY_TYPE_NAME" type backend" >> ${LOGFILE}
12 else
13 echo "Destination disk use information is currently only available for the following storage backends:" >> ${LOGFILE}