diff --git a/library/think/Request.php b/library/think/Request.php
index 1eb7f297..803a5240 100644
--- a/library/think/Request.php
+++ b/library/think/Request.php
@@ -1060,7 +1060,7 @@ class Request
                 // 调用函数或者方法过滤
                 $value = call_user_func($filter, $value);
             } elseif (is_scalar($value)) {
-                if (strpos($filter, '/')) {
+                if (false !== strpos($filter, '/')) {
                     // 正则过滤
                     if (!preg_match($filter, $value)) {
                         // 匹配不成功返回默认值