diff --git a/handlers/borg.in b/handlers/borg.in
index 3e17ed02c54f2004eaa5e139b7b5391e144a19cd..9fe70b88ebc48d4c552e9d24ec5b2bc65f9ff2b7 100644
--- a/handlers/borg.in
+++ b/handlers/borg.in
@@ -152,7 +152,7 @@ fi
 
 # borg prune
 if [ "$prune" == "yes" ]; then
-   if [ ! -z $keep ] && [ ! "$keep" == "0" ]; then
+   if [ ! "$keep" == "0" ]; then
       prune_options="${prune_options} --keep-within=${keep}"
    fi
    prunestr="borg prune $prune_options $execstr_repository"