diff --git a/src/Redis.php b/src/Redis.php
index c04c9cc..440dda5 100644
--- a/src/Redis.php
+++ b/src/Redis.php
@@ -4388,7 +4388,7 @@ public function clearLastError()
      * $redis->client('kill', <ip:port>); // Kill the process at ip:port
      * </pre>
      */
-    public function client($command, $value)
+    public function client($command, $value = '')
     {
     }