diff --git a/library/think/cache/driver/Redisd.php b/library/think/cache/driver/Redisd.php
index dbfdafad..426f594e 100644
--- a/library/think/cache/driver/Redisd.php
+++ b/library/think/cache/driver/Redisd.php
@@ -111,7 +111,8 @@ class Redisd
     public function master($master = false)
     {
         if (isset(self::$redis_rw_handler[$master])) {
-            return $this->handler = self::$redis_rw_handler[$master];
+            $this->handler = self::$redis_rw_handler[$master];
+            return $this;
         }
 
         //如果不为主，则从配置的host剔除主，并随机读从，失败以后再随机选择从
@@ -186,7 +187,8 @@ class Redisd
             throw new Exception($e->getMessage(), $e->getCode());
         }
 
-        return self::$redis_rw_handler[$master] = $this->handler;
+        self::$redis_rw_handler[$master] = $this->handler;
+        return $this;
     }
 
     /**