diff --git a/library/think/session/driver/Memcache.php b/library/think/session/driver/Memcache.php
index 2c040271..4ef044a4 100644
--- a/library/think/session/driver/Memcache.php
+++ b/library/think/session/driver/Memcache.php
@@ -87,6 +87,7 @@ class Memcache extends SessionHandler
      * @access public
      * @param string    $sessID
      * @param String    $sessData
+     * @return bool
      */
     public function write($sessID, $sessData)
     {
@@ -97,6 +98,7 @@ class Memcache extends SessionHandler
      * 删除Session
      * @access public
      * @param string $sessID
+     * @return bool
      */
     public function destroy($sessID)
     {
@@ -107,6 +109,7 @@ class Memcache extends SessionHandler
      * Session 垃圾回收
      * @access public
      * @param string $sessMaxLifeTime
+     * @return true
      */
     public function gc($sessMaxLifeTime)
     {
diff --git a/library/think/session/driver/Memcached.php b/library/think/session/driver/Memcached.php
index 4187204a..01d0f1e0 100644
--- a/library/think/session/driver/Memcached.php
+++ b/library/think/session/driver/Memcached.php
@@ -95,6 +95,7 @@ class Memcached extends SessionHandler
      * @access public
      * @param string $sessID
      * @param String $sessData
+     * @return bool
      */
     public function write($sessID, $sessData)
     {
@@ -105,6 +106,7 @@ class Memcached extends SessionHandler
      * 删除Session
      * @access public
      * @param string $sessID
+     * @return bool
      */
     public function destroy($sessID)
     {
@@ -115,6 +117,7 @@ class Memcached extends SessionHandler
      * Session 垃圾回收
      * @access public
      * @param string $sessMaxLifeTime
+     * @return true
      */
     public function gc($sessMaxLifeTime)
     {
diff --git a/library/think/session/driver/Redis.php b/library/think/session/driver/Redis.php
index e3dc9983..f360d1a6 100644
--- a/library/think/session/driver/Redis.php
+++ b/library/think/session/driver/Redis.php
@@ -108,11 +108,11 @@ class Redis extends SessionHandler
      * 删除Session
      * @access public
      * @param string $sessID
-     * @return bool|void
+     * @return bool
      */
     public function destroy($sessID)
     {
-        $this->handler->delete($this->config['session_name'] . $sessID);
+        return $this->handler->delete($this->config['session_name'] . $sessID);
     }
 
     /**