diff --git a/config.example b/config.example
index 9b369fb..6f22d28 100644
--- a/config.example
+++ b/config.example
@@ -4,4 +4,4 @@ PBS_PASSWORD='XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX'
 PBS_DATASTORE='backup'
 PBS_NAMESPACE='MyBackups'
 
-BACKUP=['root.pxar:/', 'data.pxar:/mnt/data']
+BACKUP=('root.pxar:/' 'data.pxar:/mnt/data')
diff --git a/install.sh b/install.sh
index 7fc83bf..a95bcc5 100755
--- a/install.sh
+++ b/install.sh
@@ -42,7 +42,7 @@ chmod o= "$TMPDIR/config.example"
 
 "$TMPDIR/pbc" install
 rc=$?
-if (( $? != 0 )); then
+if (( $rc != 0 )); then
   echo "Error installing pbc requirements!" >&2
   exit $rc
 fi