diff --git a/proxy/ss/packet.go b/proxy/ss/packet.go
index a9b02ce..5e01289 100644
--- a/proxy/ss/packet.go
+++ b/proxy/ss/packet.go
@@ -55,7 +55,8 @@ func (pc *PktConn) ReadFrom(b []byte) (int, net.Addr, error) {
 	}
 
 	if pc.tgtAddr == nil {
-		pc.tgtAddr = tgtAddr
+		pc.tgtAddr = make([]byte, len(tgtAddr))
+		copy(pc.tgtAddr, tgtAddr)
 	}
 
 	return n, raddr, err