diff --git a/src/main/java/com/genersoft/iot/vmp/gb28181/dao/DeviceMapper.java b/src/main/java/com/genersoft/iot/vmp/gb28181/dao/DeviceMapper.java
index ff04459f3..81ab26f3a 100755
--- a/src/main/java/com/genersoft/iot/vmp/gb28181/dao/DeviceMapper.java
+++ b/src/main/java/com/genersoft/iot/vmp/gb28181/dao/DeviceMapper.java
@@ -144,7 +144,7 @@ public interface DeviceMapper {
                 ", subscribe_cycle_for_alarm=#{subscribeCycleForAlarm}" +
                 ", expires=#{expires}" +
                 ", server_id=#{serverId}" +
-                "WHERE device_id=#{deviceId}"+
+                " WHERE device_id=#{deviceId}"+
             " </script>"})
     int update(Device device);