diff --git a/sdk/webscan/MsgPumpCallback.cpp b/sdk/webscan/MsgPumpCallback.cpp
index 81a4b7be..631c632b 100644
--- a/sdk/webscan/MsgPumpCallback.cpp
+++ b/sdk/webscan/MsgPumpCallback.cpp
@@ -43,6 +43,8 @@ void HGAPI HGMsgPumpCallback(HGMsgPump msgPump, const HGMsg* msg, HGPointer para
 	{
 		WSCmdParam* param = (WSCmdParam*)msg->data;
 		param->svr->Command(param);
+		delete[] param->data;
+		param->size = 0;
 		delete param;
 	}
 	break;
@@ -50,6 +52,8 @@ void HGAPI HGMsgPumpCallback(HGMsgPump msgPump, const HGMsg* msg, HGPointer para
 	{
 		WSEvtParam* param = (WSEvtParam*)msg->data;
 		param->svr->Event(param);
+		delete[] param->data;
+		param->size = 0;
 		delete param;
 	}
 	break;