diff --git a/library/think/cache/driver/Memcached.php b/library/think/cache/driver/Memcached.php
index 6b800c1e..a53533fb 100644
--- a/library/think/cache/driver/Memcached.php
+++ b/library/think/cache/driver/Memcached.php
@@ -116,7 +116,7 @@ class Memcached
      */
     public function inc($name, $step = 1, $expire = null)
     {
-        return $this->handler->increment($name, $step, $expire);
+        return $this->handler->increment($name, $step);
     }
 
     /**
@@ -129,7 +129,7 @@ class Memcached
      */
     public function dec($name, $step = 1, $expire = null)
     {
-        return $this->handler->decrement($name, $step, $expire);
+        return $this->handler->decrement($name, $step);
     }
 
     /**