diff --git a/src/TNetwork.cpp b/src/TNetwork.cpp
index be5c10b..eabb2fd 100644
--- a/src/TNetwork.cpp
+++ b/src/TNetwork.cpp
@@ -28,6 +28,7 @@
 #include <boost/asio/ip/address.hpp>
 #include <boost/asio/ip/address_v4.hpp>
 #include <cstring>
+#include <zlib.h>
 
 typedef boost::asio::detail::socket_option::integer<SOL_SOCKET, SO_RCVTIMEO> rcv_timeout_option;
 
@@ -965,7 +966,7 @@ void TNetwork::SendToAll(TClient* c, const std::vector<uint8_t>& Data, bool Self
         }
         if (Self || Client.get() != c) {
             if (Client->IsSynced() || Client->IsSyncing()) {
-                if (Rel || C == 'W' || C == 'Y' || C == 'V' || C == 'E') {
+                if (Rel || C == 'W' || C == 'Y' || C == 'V' || C == 'E' || compressBound(Data.size()) > 1024) {
                     if (C == 'O' || C == 'T' || Data.size() > 1000) {
                         if (Data.size() > 400) {
                             auto CompressedData = Data;