diff --git a/inc/deploycheck.class.php b/inc/deploycheck.class.php
index 1fa0bcda6c..b0bde78756 100644
--- a/inc/deploycheck.class.php
+++ b/inc/deploycheck.class.php
@@ -329,6 +329,9 @@ function getValues($type, $data, $mode) {
       foreach ($type_values as $key => $value) {
          $values[$key] = $value;
       }
+      if ($type == 'freespaceGreater' && !is_numeric($values['value'])) {
+         $values['value'] = 0;
+      }
       return $values;
    }