diff --git a/Client/Phpredis/Client.php b/Client/Phpredis/Client.php
index 5e943f3c..b826de88 100644
--- a/Client/Phpredis/Client.php
+++ b/Client/Phpredis/Client.php
@@ -592,7 +592,7 @@ public function sGetMembers()
      */
     public function sScan($key, &$iterator, $pattern = null, $count = null)
     {
-        return $this->call('sScan', array($key, $iterator, $pattern, $count));
+        return $this->call('sScan', array($key, &$iterator, $pattern, $count));
     }
 
     /**
@@ -1136,7 +1136,7 @@ public function zInter()
      */
     public function zScan($key, &$iterator, $pattern = null, $count = null)
     {
-        return $this->call('zScan', array($key, $iterator, $pattern, $count));
+        return $this->call('zScan', array($key, &$iterator, $pattern, $count));
     }
 
     /**
@@ -1248,7 +1248,7 @@ public function hMGet()
      */
     public function hScan($key, &$iterator, $pattern = null, $count = null)
     {
-        return $this->call('hScan', array($key, $iterator, $pattern, $count));
+        return $this->call('hScan', array($key, &$iterator, $pattern, $count));
     }
 
     /**
@@ -1344,7 +1344,7 @@ public function time()
      */
     public function scan(&$iterator, $pattern = null, $count = null)
     {
-        return $this->call('scan', array($iterator, $pattern, $count));
+        return $this->call('scan', array(&$iterator, $pattern, $count));
     }
 
     /**