diff --git a/lib/Alchemy/Phrasea/Cache/RedisCache.php b/lib/Alchemy/Phrasea/Cache/RedisCache.php
index 32bebef9b9..267e45abbe 100644
--- a/lib/Alchemy/Phrasea/Cache/RedisCache.php
+++ b/lib/Alchemy/Phrasea/Cache/RedisCache.php
@@ -142,14 +142,11 @@ public function deleteMulti(array $keys)
 
     public function removeByPattern($pattern)
     {
-        $keysToremove = [];
         $iterator = null;
         while(false !== ($keys = $this->_redis->scan($iterator, $pattern))) {
-            $keysToremove = array_merge($keysToremove, $keys);
+            $this->_redis->del($keys);
         }
 
-        $this->_redis->del($keysToremove);
-
         return true;
     }