diff --git a/pkg/core/server_client.go b/pkg/core/server_client.go
index eff83e2..73a1ba3 100644
--- a/pkg/core/server_client.go
+++ b/pkg/core/server_client.go
@@ -343,9 +343,9 @@ func (c *serverClient) handleUDP(stream quic.Stream) {
 					}
 					// try no frag first
 					_ = struc.Pack(&msgBuf, &msg)
-					err = c.CS.SendMessage(msgBuf.Bytes())
-					if err != nil {
-						if errSize, ok := err.(quic.ErrMessageToLarge); ok {
+					sendErr := c.CS.SendMessage(msgBuf.Bytes())
+					if sendErr != nil {
+						if errSize, ok := sendErr.(quic.ErrMessageToLarge); ok {
 							// need to frag
 							msg.MsgID = uint16(rand.Intn(0xFFFF)) + 1 // msgID must be > 0 when fragCount > 1
 							fragMsgs := fragUDPMessage(msg, int(errSize))