diff --git a/library/think/cache/driver/Memcache.php b/library/think/cache/driver/Memcache.php
index 815f60b7..58703ea3 100644
--- a/library/think/cache/driver/Memcache.php
+++ b/library/think/cache/driver/Memcache.php
@@ -63,7 +63,7 @@ class Memcache extends Driver
     public function has($name)
     {
         $key = $this->getCacheKey($name);
-        return $this->handler->get($key) ? true : false;
+        return false !== $this->handler->get($key);
     }
 
     /**
diff --git a/library/think/cache/driver/Redis.php b/library/think/cache/driver/Redis.php
index bb8713a6..027b3ea2 100644
--- a/library/think/cache/driver/Redis.php
+++ b/library/think/cache/driver/Redis.php
@@ -70,7 +70,7 @@ class Redis extends Driver
      */
     public function has($name)
     {
-        return $this->handler->get($this->getCacheKey($name)) ? true : false;
+        return $this->handler->exists($this->getCacheKey($name));
     }
 
     /**