diff --git a/Library/Think/Tag.php b/Library/Think/Tag.php
index b412d209..36d0b4ed 100644
--- a/Library/Think/Tag.php
+++ b/Library/Think/Tag.php
@@ -22,8 +22,8 @@ class Tag {
      * @return void
      */
     static public function add($tag,$behavior) {
-        if(is_array($hehavior)) {
-            self::$tags[$tag] =   array_merge(self::$tags[$tag],$hehavior);
+        if(is_array($behavior)) {
+            self::$tags[$tag] =   array_merge(self::$tags[$tag],$behavior);
         }else{
             self::$tags[$tag][] =   $behavior;
         }