diff --git a/device/device.go b/device/device.go
index f76fb08..ef394cb 100644
--- a/device/device.go
+++ b/device/device.go
@@ -583,6 +583,7 @@ func (device *Device) handlePostConfig(tempASecCfg *aSecCfgType) (err error) {
 			tempASecCfg.underloadPacketMagicHeader,
 			tempASecCfg.transportPacketMagicHeader,
 		)
+		device.isASecOn.UnSet()
 		return 
 	}