diff --git a/components/grid.inc b/components/grid.inc
index 5897a41..0ddcf11 100644
--- a/components/grid.inc
+++ b/components/grid.inc
@@ -203,10 +203,10 @@
   $value = isset($element['#default_value']) ? $element['#default_value'] : array();
   foreach (element_children($element) as $key) {
     if (isset($value[$key])) {
-      $element[$key]['#default_value'] = ($value[$key] !== '') ? $value[$key] : FALSE;
+      $element[$key]['#default_value'] = ($value[$key] !== '') ? $value[$key] : NULL;
     }
     else {
-      $element[$key]['#default_value'] = FALSE;
+      $element[$key]['#default_value'] = NULL;
     }
   }