diff --git a/html5_tools.module b/html5_tools.module
index 53d90b4..f57701b 100644
--- a/html5_tools.module
+++ b/html5_tools.module
@@ -380,7 +380,7 @@ function _numberfield_html5_tools_field_widget_forms(&$form, &$form_state, $fiel
   );
 
   // Add min attribute.
-  if (!empty($instance['settings']['min'])) {
+  if (!empty($instance['settings']['min']) || $instance['settings']['min'] === '0') {
     $element['#min'] = $instance['settings']['min'];
   }