diff --git a/Source/Core/Common/TraversalClient.h b/Source/Core/Common/TraversalClient.h
index d322761ffd..9d61680771 100644
--- a/Source/Core/Common/TraversalClient.h
+++ b/Source/Core/Common/TraversalClient.h
@@ -19,7 +19,7 @@ public:
   virtual ~TraversalClientClient() = default;
   virtual void OnTraversalStateChanged() = 0;
   virtual void OnConnectReady(ENetAddress addr) = 0;
-  virtual void OnConnectFailed(u8 reason) = 0;
+  virtual void OnConnectFailed(TraversalConnectFailedReason reason) = 0;
 };
 
 class TraversalClient
diff --git a/Source/Core/Common/TraversalProto.h b/Source/Core/Common/TraversalProto.h
index 828d782626..95ef2bb994 100644
--- a/Source/Core/Common/TraversalProto.h
+++ b/Source/Core/Common/TraversalProto.h
@@ -34,11 +34,11 @@ enum
   TraversalProtoVersion = 0
 };
 
-enum TraversalConnectFailedReason
+enum class TraversalConnectFailedReason : u8
 {
-  TraversalConnectFailedClientDidntRespond = 0,
-  TraversalConnectFailedClientFailure,
-  TraversalConnectFailedNoSuchClient
+  ClientDidntRespond = 0,
+  ClientFailure,
+  NoSuchClient,
 };
 
 #pragma pack(push, 1)
@@ -88,7 +88,7 @@ struct TraversalPacket
     struct
     {
       TraversalRequestId requestId;
-      u8 reason;
+      TraversalConnectFailedReason reason;
     } connectFailed;
   };
 };
diff --git a/Source/Core/Common/TraversalServer.cpp b/Source/Core/Common/TraversalServer.cpp
index 80d32d52fa..2c383bcbd7 100644
--- a/Source/Core/Common/TraversalServer.cpp
+++ b/Source/Core/Common/TraversalServer.cpp
@@ -247,7 +247,7 @@ static void ResendPackets()
     TraversalPacket* fail = AllocPacket(MakeSinAddr(p.first));
     fail->type = TraversalPacketConnectFailed;
     fail->connectFailed.requestId = p.second;
-    fail->connectFailed.reason = TraversalConnectFailedClientDidntRespond;
+    fail->connectFailed.reason = TraversalConnectFailedReason::ClientDidntRespond;
   }
 }
 
@@ -280,7 +280,7 @@ static void HandlePacket(TraversalPacket* packet, sockaddr_in6* addr)
       {
         ready->type = TraversalPacketConnectFailed;
         ready->connectFailed.requestId = info->misc;
-        ready->connectFailed.reason = TraversalConnectFailedClientFailure;
+        ready->connectFailed.reason = TraversalConnectFailedReason::ClientFailure;
       }
     }
 
@@ -332,7 +332,7 @@ static void HandlePacket(TraversalPacket* packet, sockaddr_in6* addr)
       TraversalPacket* reply = AllocPacket(*addr);
       reply->type = TraversalPacketConnectFailed;
       reply->connectFailed.requestId = packet->requestId;
-      reply->connectFailed.reason = TraversalConnectFailedNoSuchClient;
+      reply->connectFailed.reason = TraversalConnectFailedReason::NoSuchClient;
     }
     else
     {
diff --git a/Source/Core/Core/NetPlayClient.cpp b/Source/Core/Core/NetPlayClient.cpp
index 2ebc2e7a50..f144f77c52 100644
--- a/Source/Core/Core/NetPlayClient.cpp
+++ b/Source/Core/Core/NetPlayClient.cpp
@@ -1780,19 +1780,19 @@ void NetPlayClient::OnConnectReady(ENetAddress addr)
 }
 
 // called from ---NETPLAY--- thread
-void NetPlayClient::OnConnectFailed(u8 reason)
+void NetPlayClient::OnConnectFailed(TraversalConnectFailedReason reason)
 {
   m_connecting = false;
   m_connection_state = ConnectionState::Failure;
   switch (reason)
   {
-  case TraversalConnectFailedClientDidntRespond:
+  case TraversalConnectFailedReason::ClientDidntRespond:
     PanicAlertFmtT("Traversal server timed out connecting to the host");
     break;
-  case TraversalConnectFailedClientFailure:
+  case TraversalConnectFailedReason::ClientFailure:
     PanicAlertFmtT("Server rejected traversal attempt");
     break;
-  case TraversalConnectFailedNoSuchClient:
+  case TraversalConnectFailedReason::NoSuchClient:
     PanicAlertFmtT("Invalid host");
     break;
   default:
diff --git a/Source/Core/Core/NetPlayClient.h b/Source/Core/Core/NetPlayClient.h
index cced924dbb..c0ab68f7f0 100644
--- a/Source/Core/Core/NetPlayClient.h
+++ b/Source/Core/Core/NetPlayClient.h
@@ -125,7 +125,7 @@ public:
 
   void OnTraversalStateChanged() override;
   void OnConnectReady(ENetAddress addr) override;
-  void OnConnectFailed(u8 reason) override;
+  void OnConnectFailed(TraversalConnectFailedReason reason) override;
 
   bool IsFirstInGamePad(int ingame_pad) const;
   int NumLocalPads() const;
diff --git a/Source/Core/Core/NetPlayServer.h b/Source/Core/Core/NetPlayServer.h
index 16034074af..67819be9bf 100644
--- a/Source/Core/Core/NetPlayServer.h
+++ b/Source/Core/Core/NetPlayServer.h
@@ -134,7 +134,7 @@ private:
 
   void OnTraversalStateChanged() override;
   void OnConnectReady(ENetAddress) override {}
-  void OnConnectFailed(u8) override {}
+  void OnConnectFailed(TraversalConnectFailedReason) override {}
   void UpdatePadMapping();
   void UpdateWiimoteMapping();
   std::vector<std::pair<std::string, std::string>> GetInterfaceListInternal() const;