diff --git a/library/think/Validate.php b/library/think/Validate.php
index 0986c836..fc38d89a 100644
--- a/library/think/Validate.php
+++ b/library/think/Validate.php
@@ -359,6 +359,7 @@ class Validate
                         } elseif (method_exists($this, $rule)) {
                             $type = $rule;
                             $info = $rule;
+                            $rule = '';
                         } else {
                             $type = 'is';
                             $info = $rule;