diff --git a/Source/Core/Core/NetPlayClient.cpp b/Source/Core/Core/NetPlayClient.cpp
index 37eaa12531..9389f66cd7 100644
--- a/Source/Core/Core/NetPlayClient.cpp
+++ b/Source/Core/Core/NetPlayClient.cpp
@@ -560,7 +560,7 @@ unsigned int NetPlayClient::OnData(sf::Packet& packet)
   return 0;
 }
 
-void NetPlayClient::Send(sf::Packet& packet)
+void NetPlayClient::Send(const sf::Packet& packet)
 {
   ENetPacket* epac =
       enet_packet_create(packet.getData(), packet.getDataSize(), ENET_PACKET_FLAG_RELIABLE);
@@ -1150,7 +1150,7 @@ int NetPlayClient::NumLocalPads() const
   }));
 }
 
-int NetPlayClient::InGamePadToLocalPad(int ingame_pad)
+int NetPlayClient::InGamePadToLocalPad(int ingame_pad) const
 {
   // not our pad
   if (m_pad_map[ingame_pad] != m_local_player->pid)
@@ -1168,7 +1168,7 @@ int NetPlayClient::InGamePadToLocalPad(int ingame_pad)
   return local_pad;
 }
 
-int NetPlayClient::LocalPadToInGamePad(int local_pad)
+int NetPlayClient::LocalPadToInGamePad(int local_pad) const
 {
   // Figure out which in-game pad maps to which local pad.
   // The logic we have here is that the local slots always
diff --git a/Source/Core/Core/NetPlayClient.h b/Source/Core/Core/NetPlayClient.h
index 5b9907319a..79545a6d35 100644
--- a/Source/Core/Core/NetPlayClient.h
+++ b/Source/Core/Core/NetPlayClient.h
@@ -93,8 +93,8 @@ public:
   bool IsFirstInGamePad(int ingame_pad) const;
   int NumLocalPads() const;
 
-  int InGamePadToLocalPad(int ingame_pad);
-  int LocalPadToInGamePad(int localPad);
+  int InGamePadToLocalPad(int ingame_pad) const;
+  int LocalPadToInGamePad(int localPad) const;
 
   static void SendTimeBase();
   bool DoAllPlayersHaveGame();
@@ -156,7 +156,7 @@ private:
   void SendPadState(int in_game_pad, const GCPadStatus& np);
   void SendWiimoteState(int in_game_pad, const NetWiimote& nw);
   unsigned int OnData(sf::Packet& packet);
-  void Send(sf::Packet& packet);
+  void Send(const sf::Packet& packet);
   void Disconnect();
   bool Connect();
   void ComputeMD5(const std::string& file_identifier);