diff --git a/src/network/network_client.cpp b/src/network/network_client.cpp
index dc03be2aff..f35c13bc06 100644
--- a/src/network/network_client.cpp
+++ b/src/network/network_client.cpp
@@ -288,7 +288,8 @@ void ClientNetworkGameSocketHandler::ClientError(NetworkRecvStatus res)
 			if (_sync_seed_1 != _random.state[0] || _sync_state_checksum != _state_checksum.state) {
 #endif
 				NetworkError(STR_NETWORK_ERROR_DESYNC);
-				DEBUG(desync, 1, "sync_err: date{%08x; %02x; %02x}", _date, _date_fract, _tick_skip_counter);
+				DEBUG(desync, 1, "sync_err: date{%08x; %02x; %02x} {%x, " OTTD_PRINTFHEX64 "} != {%x, " OTTD_PRINTFHEX64 "}"
+						, _date, _date_fract, _tick_skip_counter, _sync_seed_1, _sync_state_checksum, _random.state[0], _state_checksum.state);
 				DEBUG(net, 0, "Sync error detected!");
 
 				std::string desync_log;