diff --git a/client/Client.cpp b/client/Client.cpp
index 9a2af0c..80cb17a 100644
--- a/client/Client.cpp
+++ b/client/Client.cpp
@@ -38,7 +38,7 @@ bool BaseClient::Login(const std::string &nickname) {
   std::memset(loginPkt.nickname, 0, sizeof(loginPkt.nickname));
   std::strncpy(loginPkt.nickname, nickname.c_str(),
                sizeof(loginPkt.nickname) - 1);
-  SendPacket(PacketID::Login, &loginPkt, sizeof(loginPkt));
+  SendPacket(PacketID::CS_Login, &loginPkt, sizeof(loginPkt));
   std::cout << "로그인 요청 보냄: " << nickname << std::endl;
 
   // 로그인 결과 대기
diff --git a/include/Packet.h b/include/Packet.h
index 9f8197e..d73e4dd 100644
--- a/include/Packet.h
+++ b/include/Packet.h
@@ -21,7 +21,7 @@ struct Packet {
 enum class PacketID : uint16_t {
   Ping = 1,
   // 로그인 요청 (PKT_CS_Login)
-  Login = 10,
+  CS_Login = 10,
   // 로그인 결과 응답 (PKT_SC_LoginResult)
   SC_LoginResult = 11,
   Chat = 20,
diff --git a/server/PacketHandler.cpp b/server/PacketHandler.cpp
index a02fe61..af3633f 100644
--- a/server/PacketHandler.cpp
+++ b/server/PacketHandler.cpp
@@ -18,7 +18,7 @@ PacketHandler::HandlePacket(std::shared_ptr<Session> session,
         sizeof(PacketHeader)));
   } break;
 
-  case PacketID::Login: {
+  case PacketID::CS_Login: {
     if (packet.payload.size() < sizeof(PKT_CS_Login)) {
       Logger::Log("로그인 패킷 크기가 올바르지 않습니다.");
       co_return;
@@ -36,9 +36,8 @@ PacketHandler::HandlePacket(std::shared_ptr<Session> session,
 
     PKT_SC_LoginResult loginResult;
 
-    // 원자적으로 중복 체크 및 세션 추가
+    // 중복 체크
     if (!SessionManager::GetInstance().TryJoin(session, userData.nickname)) {
-      // 이미 접속 중인 유저
       Logger::Log("중복 로그인 거부: ", nickname);
       loginResult.result = 0;
 
@@ -60,7 +59,6 @@ PacketHandler::HandlePacket(std::shared_ptr<Session> session,
                 " (Gold: ", session->GetGold(),
                 ", Level: ", session->GetSwordLevel(), ")");
 
-    // 로그인 성공 응답
     loginResult.result = 1;
 
     PacketHeader header;