diff --git a/Source/Core/Core/NetPlayProto.h b/Source/Core/Core/NetPlayProto.h
index 4a2e4d263c..4d3cf436fb 100644
--- a/Source/Core/Core/NetPlayProto.h
+++ b/Source/Core/Core/NetPlayProto.h
@@ -122,6 +122,8 @@ struct NetTraversalConfig
 
 enum class MessageID : u8
 {
+  ConnectionSuccessful = 0,
+
   PlayerJoin = 0x10,
   PlayerLeave = 0x11,
 
@@ -225,7 +227,6 @@ struct WiimoteInput
   u8 report_id;
   std::vector<u8> data;
 };
-using MessageId = u8;
 using PlayerId = u8;
 using FrameNum = u32;
 using PadIndex = s8;
diff --git a/Source/Core/Core/NetPlayServer.cpp b/Source/Core/Core/NetPlayServer.cpp
index f75daf2208..c125cef358 100644
--- a/Source/Core/Core/NetPlayServer.cpp
+++ b/Source/Core/Core/NetPlayServer.cpp
@@ -431,9 +431,9 @@ ConnectionError NetPlayServer::OnConnect(ENetPeer* socket, sf::Packet& rpac)
   spac << player.pid << player.name << player.revision;
   SendToClients(spac);
 
-  // send new client success message with their id
+  // send new client success message with their ID
   spac.clear();
-  spac << static_cast<MessageId>(0);
+  spac << MessageID::ConnectionSuccessful;
   spac << player.pid;
   Send(player.socket, spac);