diff --git a/src/Cm/RedisSession/Handler.php b/src/Cm/RedisSession/Handler.php
index 671f099..5be8c80 100644
--- a/src/Cm/RedisSession/Handler.php
+++ b/src/Cm/RedisSession/Handler.php
@@ -253,6 +253,13 @@ class Handler implements \SessionHandlerInterface
      * @var boolean
      */
     private $_readOnly;
+   
+    /**
+     * Additional Configurable Prefix for Session 
+     *
+     * @var string
+     */
+    private $_prefixAdditional;
 
     /**
      * @param ConfigInterface $config
@@ -284,6 +291,7 @@ public function __construct(ConfigInterface $config, LoggerInterface $logger, $r
         $this->_failAfter =             $this->config->getFailAfter() ?: self::DEFAULT_FAIL_AFTER;
         $this->_maxLifetime =           $this->config->getMaxLifetime() ?: self::DEFAULT_MAX_LIFETIME;
         $this->_minLifetime =           $this->config->getMinLifetime() ?: self::DEFAULT_MIN_LIFETIME;
+        $this->_prefixAdditional =      $this->config->getPrefix() ?: '';
         $this->_useLocking =            ! $this->config->getDisableLocking();
 
         // Use sleep time multiplier so fail after time is in seconds
@@ -411,7 +419,7 @@ protected function hasConnection()
     public function read($sessionId)
     {
         // Get lock on session. Increment the "lock" field and if the new value is 1, we have the lock.
-        $sessionId = self::SESSION_PREFIX.$sessionId;
+        $sessionId = 'sess_'.$this->_prefixAdditional.$sessionId;
         $tries = $waiting = $lock = 0;
         $lockPid = $oldLockPid = null; // Restart waiting for lock when current lock holder changes
         $detectZombies = false;
@@ -616,6 +624,8 @@ public function read($sessionId)
      */
     public function write($sessionId, $sessionData)
     {
+        $sessionId = 'sess_'.$this->_prefixAdditional.$sessionId;
+       
         if ($this->_sessionWritten || $this->_readOnly) {
             $this->_log(sprintf(($this->_sessionWritten ? "Repeated" : "Read-only") . " session write detected; skipping for ID %s", $sessionId));
             return true;
@@ -628,7 +638,7 @@ public function write($sessionId, $sessionData)
             if($this->_dbNum) $this->_redis->select($this->_dbNum);  // Prevent conflicts with other connections?
 
             if ( ! $this->_useLocking
-                || ( ! ($pid = $this->_redis->hGet('sess_'.$sessionId, 'pid')) || $pid == $this->_getPid())
+                || ( ! ($pid = $this->_redis->hGet($sessionId, 'pid')) || $pid == $this->_getPid())
             ) {
                 $this->_writeRawSession($sessionId, $sessionData, $this->getLifeTime());
                 $this->_log(sprintf("Data written to ID %s in %.5f seconds", $sessionId, (microtime(true) - $timeStart)));
@@ -661,10 +671,12 @@ public function write($sessionId, $sessionData)
      */
     public function destroy($sessionId)
     {
+        
+        $sessionId = 'sess_'.$this->_prefixAdditional.$sessionId;
         $this->_log(sprintf("Destroying ID %s", $sessionId));
         $this->_redis->pipeline();
         if($this->_dbNum) $this->_redis->select($this->_dbNum);
-        $this->_redis->del(self::SESSION_PREFIX.$sessionId);
+        $this->_redis->del($sessionId);
         $this->_redis->exec();
         return true;
     }
@@ -828,15 +840,14 @@ protected function _decodeData($data)
      */
     protected function _writeRawSession($id, $data, $lifetime)
     {
-        $sessionId = 'sess_' . $id;
         $this->_redis->pipeline()
             ->select($this->_dbNum)
-            ->hMSet($sessionId, array(
+            ->hMSet($id, array(
                 'data' => $this->_encodeData($data),
                 'lock' => 0, // 0 so that next lock attempt will get 1
             ))
-            ->hIncrBy($sessionId, 'writes', 1)
-            ->expire($sessionId, min((int)$lifetime, (int)$this->_maxLifetime))
+            ->hIncrBy($id, 'writes', 1)
+            ->expire($id, min((int)$lifetime, (int)$this->_maxLifetime))
             ->exec();
     }
 
diff --git a/src/Cm/RedisSession/Handler/ConfigInterface.php b/src/Cm/RedisSession/Handler/ConfigInterface.php
index a315c20..db9a760 100644
--- a/src/Cm/RedisSession/Handler/ConfigInterface.php
+++ b/src/Cm/RedisSession/Handler/ConfigInterface.php
@@ -192,4 +192,14 @@ public function getSentinelVerifyMaster();
      * @return string
      */
     public function getSentinelConnectRetries();
+   
+   
+    /**
+     * Get configurable prefix for session ID
+     *
+     * @return string
+     */
+    public function getPrefix();
+   
+   
 }