diff --git a/src/main/java/com/genersoft/iot/vmp/service/redisMsg/RedisAlarmMsgListener.java b/src/main/java/com/genersoft/iot/vmp/service/redisMsg/RedisAlarmMsgListener.java
index 2042b9ae..d99cc98f 100644
--- a/src/main/java/com/genersoft/iot/vmp/service/redisMsg/RedisAlarmMsgListener.java
+++ b/src/main/java/com/genersoft/iot/vmp/service/redisMsg/RedisAlarmMsgListener.java
@@ -18,6 +18,7 @@ import org.springframework.util.ObjectUtils;
 
 import javax.sip.InvalidArgumentException;
 import javax.sip.SipException;
+import javax.validation.constraints.NotNull;
 import java.text.ParseException;
 import java.util.List;
 import java.util.concurrent.ConcurrentLinkedQueue;