diff --git a/scripts/functions.sh b/scripts/functions.sh
index 19f11ad..17167b9 100644
--- a/scripts/functions.sh
+++ b/scripts/functions.sh
@@ -39,9 +39,9 @@ function check_borg_backup_vars() {
   local errors=0
 
   if [ ! -z "$BORG_BACKUP_TRUE" ]; then
-    if [ "$BORG_REPO" ]; then echo "Musst provice BORG_REPO"; errors=$(($errors + 1)); fi
-    if [ "$BORG_CREATE_PARAMS" ]; then echo "Musst provice BORG_CREATE_PARAMS"; errors=$(($errors + 1)); fi
-    if [ "$BORG_PRUNE_PARAMS" ]; then echo "Musst provice BORG_PRUNE_PARAMS"; errors=$(($errors + 1)); fi
+    if [ -z "$BORG_REPO" ]; then echo "Musst provice BORG_REPO"; errors=$(($errors + 1)); fi
+    if [ -z "$BORG_CREATE_PARAMS" ]; then echo "Musst provice BORG_CREATE_PARAMS"; errors=$(($errors + 1)); fi
+    if [ -z "$BORG_PRUNE_PARAMS" ]; then echo "Musst provice BORG_PRUNE_PARAMS"; errors=$(($errors + 1)); fi
   fi
 
   if [ $errors -ne 0 ]; then exit 1; fi