diff --git a/src/main/java/org/crazycake/shiro/RedisSentinelManager.java b/src/main/java/org/crazycake/shiro/RedisSentinelManager.java
index b8de88c4d..19acb0a8a 100644
--- a/src/main/java/org/crazycake/shiro/RedisSentinelManager.java
+++ b/src/main/java/org/crazycake/shiro/RedisSentinelManager.java
@@ -26,7 +26,7 @@ public class RedisSentinelManager extends WorkAloneRedisManager implements IRedi
 
 	private int database = Protocol.DEFAULT_DATABASE;
 
-	private JedisSentinelPool jedisPool;
+	private volatile JedisSentinelPool jedisPool;
 
 	@Override
 	protected Jedis getJedis() {