diff --git a/src/network/core/config.h b/src/network/core/config.h
index e5b16547a2..09fa460129 100644
--- a/src/network/core/config.h
+++ b/src/network/core/config.h
@@ -96,4 +96,9 @@ static const uint NETWORK_GRF_NAME_LENGTH           =   80;           ///< Maxim
  */
 static const uint NETWORK_MAX_GRF_COUNT             =   255;
 
+/**
+ * Maximum version supported in PACKET_SERVER_GAME_INFO_EXTENDED
+ */
+static const uint8 SERVER_GAME_INFO_EXTENDED_MAX_VERSION = 1;
+
 #endif /* NETWORK_CORE_CONFIG_H */
diff --git a/src/network/core/game_info.cpp b/src/network/core/game_info.cpp
index a1062bbc08..3962529249 100644
--- a/src/network/core/game_info.cpp
+++ b/src/network/core/game_info.cpp
@@ -434,7 +434,7 @@ void DeserializeNetworkGameInfoExtended(Packet *p, NetworkGameInfo *info)
 	static const Date MAX_DATE = ConvertYMDToDate(MAX_YEAR, 11, 31); // December is month 11
 
 	const uint8 version = p->Recv_uint8();
-	if (version > 1) return; // Unknown version
+	if (version > SERVER_GAME_INFO_EXTENDED_MAX_VERSION) return; // Unknown version
 
 	NewGRFSerializationType newgrf_serialisation = NST_GRFID_MD5;
 
diff --git a/src/network/network_query.cpp b/src/network/network_query.cpp
index 9d8919ba89..4e420209af 100644
--- a/src/network/network_query.cpp
+++ b/src/network/network_query.cpp
@@ -73,9 +73,9 @@ NetworkRecvStatus QueryNetworkGameSocketHandler::SendGameInfo()
 {
 	Packet *p = new Packet(PACKET_CLIENT_GAME_INFO);
 	p->Send_uint32(FIND_SERVER_EXTENDED_TOKEN);
-	p->Send_uint8(PACKET_SERVER_GAME_INFO_EXTENDED); // reply type
-	p->Send_uint16(0); // flags
-	p->Send_uint16(0); // version
+	p->Send_uint8(PACKET_SERVER_GAME_INFO_EXTENDED);       // reply type
+	p->Send_uint16(0);                                     // flags
+	p->Send_uint16(SERVER_GAME_INFO_EXTENDED_MAX_VERSION); // version
 	this->SendPacket(p);
 
 	return NETWORK_RECV_STATUS_OKAY;