diff --git a/src/openrct2/network/ServerList.cpp b/src/openrct2/network/ServerList.cpp
index f5106a52ac..d2efbb0fac 100644
--- a/src/openrct2/network/ServerList.cpp
+++ b/src/openrct2/network/ServerList.cpp
@@ -152,7 +152,7 @@ void ServerList::Clear()
     _serverEntries.clear();
 }
 
-std::vector<ServerListEntry> ServerList::ReadFavourites()
+std::vector<ServerListEntry> ServerList::ReadFavourites() const
 {
     log_verbose("server_list_read(...)");
     std::vector<ServerListEntry> entries;
@@ -197,7 +197,7 @@ void ServerList::ReadAndAddFavourites()
     AddRange(entries);
 }
 
-void ServerList::WriteFavourites()
+void ServerList::WriteFavourites() const
 {
     // Save just favourite servers
     std::vector<ServerListEntry> favouriteServers;
@@ -207,7 +207,7 @@ void ServerList::WriteFavourites()
     WriteFavourites(favouriteServers);
 }
 
-bool ServerList::WriteFavourites(const std::vector<ServerListEntry>& entries)
+bool ServerList::WriteFavourites(const std::vector<ServerListEntry>& entries) const
 {
     log_verbose("server_list_write(%d, 0x%p)", entries.size(), entries.data());
 
@@ -234,7 +234,7 @@ bool ServerList::WriteFavourites(const std::vector<ServerListEntry>& entries)
     }
 }
 
-std::future<std::vector<ServerListEntry>> ServerList::FetchLocalServerListAsync(const INetworkEndpoint& broadcastEndpoint)
+std::future<std::vector<ServerListEntry>> ServerList::FetchLocalServerListAsync(const INetworkEndpoint& broadcastEndpoint) const
 {
     auto broadcastAddress = broadcastEndpoint.GetHostname();
     return std::async(std::launch::async, [broadcastAddress] {
@@ -293,7 +293,7 @@ std::future<std::vector<ServerListEntry>> ServerList::FetchLocalServerListAsync(
     });
 }
 
-std::future<std::vector<ServerListEntry>> ServerList::FetchLocalServerListAsync()
+std::future<std::vector<ServerListEntry>> ServerList::FetchLocalServerListAsync() const
 {
     return std::async(std::launch::async, [&] {
         // Get all possible LAN broadcast addresses
@@ -325,7 +325,7 @@ std::future<std::vector<ServerListEntry>> ServerList::FetchLocalServerListAsync(
     });
 }
 
-std::future<std::vector<ServerListEntry>> ServerList::FetchOnlineServerListAsync()
+std::future<std::vector<ServerListEntry>> ServerList::FetchOnlineServerListAsync() const
 {
 #    ifdef DISABLE_HTTP
     return {};
diff --git a/src/openrct2/network/ServerList.h b/src/openrct2/network/ServerList.h
index 84e4ca2a33..b0cb5e1bc2 100644
--- a/src/openrct2/network/ServerList.h
+++ b/src/openrct2/network/ServerList.h
@@ -44,9 +44,9 @@ private:
     std::vector<ServerListEntry> _serverEntries;
 
     void Sort();
-    std::vector<ServerListEntry> ReadFavourites();
-    bool WriteFavourites(const std::vector<ServerListEntry>& entries);
-    std::future<std::vector<ServerListEntry>> FetchLocalServerListAsync(const INetworkEndpoint& broadcastEndpoint);
+    std::vector<ServerListEntry> ReadFavourites() const;
+    bool WriteFavourites(const std::vector<ServerListEntry>& entries) const;
+    std::future<std::vector<ServerListEntry>> FetchLocalServerListAsync(const INetworkEndpoint& broadcastEndpoint) const;
 
 public:
     ServerListEntry& GetServer(size_t index);
@@ -56,10 +56,10 @@ public:
     void Clear();
 
     void ReadAndAddFavourites();
-    void WriteFavourites();
+    void WriteFavourites() const;
 
-    std::future<std::vector<ServerListEntry>> FetchLocalServerListAsync();
-    std::future<std::vector<ServerListEntry>> FetchOnlineServerListAsync();
+    std::future<std::vector<ServerListEntry>> FetchLocalServerListAsync() const;
+    std::future<std::vector<ServerListEntry>> FetchOnlineServerListAsync() const;
     uint32_t GetTotalPlayerCount() const;
 };
 
diff --git a/src/openrct2/network/Socket.cpp b/src/openrct2/network/Socket.cpp
index e0ef79537b..12fed91b78 100644
--- a/src/openrct2/network/Socket.cpp
+++ b/src/openrct2/network/Socket.cpp
@@ -216,12 +216,12 @@ public:
         CloseSocket();
     }
 
-    SOCKET_STATUS GetStatus() override
+    SOCKET_STATUS GetStatus() const override
     {
         return _status;
     }
 
-    const char* GetError() override
+    const char* GetError() const override
     {
         return _error.empty() ? nullptr : _error.c_str();
     }
@@ -583,12 +583,12 @@ public:
         CloseSocket();
     }
 
-    SOCKET_STATUS GetStatus() override
+    SOCKET_STATUS GetStatus() const override
     {
         return _status;
     }
 
-    const char* GetError() override
+    const char* GetError() const override
     {
         return _error.empty() ? nullptr : _error.c_str();
     }
@@ -739,12 +739,12 @@ private:
         }
 
         // Turn off IPV6_V6ONLY so we can accept both v4 and v6 connections
-        if (!SetOption(_socket, IPPROTO_IPV6, IPV6_V6ONLY, false))
+        if (!SetOption(sock, IPPROTO_IPV6, IPV6_V6ONLY, false))
         {
             log_warning("IPV6_V6ONLY failed. %d", LAST_SOCKET_ERROR());
         }
 
-        if (!SetOption(_socket, SOL_SOCKET, SO_REUSEADDR, true))
+        if (!SetOption(sock, SOL_SOCKET, SO_REUSEADDR, true))
         {
             log_warning("SO_REUSEADDR failed. %d", LAST_SOCKET_ERROR());
         }
diff --git a/src/openrct2/network/Socket.h b/src/openrct2/network/Socket.h
index 87d563cf23..601168b31b 100644
--- a/src/openrct2/network/Socket.h
+++ b/src/openrct2/network/Socket.h
@@ -52,8 +52,8 @@ interface ITcpSocket
 public:
     virtual ~ITcpSocket() = default;
 
-    virtual SOCKET_STATUS GetStatus() abstract;
-    virtual const char* GetError() abstract;
+    virtual SOCKET_STATUS GetStatus() const abstract;
+    virtual const char* GetError() const abstract;
     virtual const char* GetHostName() const abstract;
 
     virtual void Listen(uint16_t port) abstract;
@@ -78,8 +78,8 @@ interface IUdpSocket
 public:
     virtual ~IUdpSocket() = default;
 
-    virtual SOCKET_STATUS GetStatus() abstract;
-    virtual const char* GetError() abstract;
+    virtual SOCKET_STATUS GetStatus() const abstract;
+    virtual const char* GetError() const abstract;
     virtual const char* GetHostName() const abstract;
 
     virtual void Listen(uint16_t port) abstract;