diff --git a/src/main/scala/backBoard/shin/MstSlvSwitch.scala b/src/main/scala/backBoard/shin/MstSlvSwitch.scala
index ce2357f..0a4b53c 100644
--- a/src/main/scala/backBoard/shin/MstSlvSwitch.scala
+++ b/src/main/scala/backBoard/shin/MstSlvSwitch.scala
@@ -489,7 +489,7 @@ trait MstSlvSwitchWatchDog{ this: MstSlvSwitchBase =>
     interface.io.wdtTrigger(0)
   ){
     isWdtRec2RtnEnable := false.B
-  } .elsewhen( ~isWdtRec2RtnEnable & downCDROut.io.axis.fire & downCDROut.io.axis.bits.tlast & interface.io.cReg.wdtEnable.extract(0) ){
+  } .elsewhen( ~isWdtRec2RtnEnable & downCDROut.io.axis.fire & interface.io.cReg.wdtEnable.extract(0) ){
     isWdtRec2RtnEnable := true.B
   }