diff --git a/a8/udpsession.cc b/a8/udpsession.cc
index 028532c..bbf2ded 100644
--- a/a8/udpsession.cc
+++ b/a8/udpsession.cc
@@ -18,7 +18,11 @@ namespace a8
 
     UdpSession::~UdpSession()
     {
-
+        if (recv_buff_) {
+            recv_bufflen_ = 0;
+            free(recv_buff_);
+            recv_buff_ = nullptr;
+        }
     }
 
     void UdpSession::Update()