diff --git a/CMakeLists.txt b/CMakeLists.txt
index bc8d9a19c..0e14b8467 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -601,6 +601,7 @@ set(CAMERA_LIBS  src/core/libraries/camera/camera.cpp
 
 set(COMPANION_LIBS  src/core/libraries/companion/companion_httpd.cpp
                     src/core/libraries/companion/companion_httpd.h
+                    src/core/libraries/companion/companion_error.h
 )
 set(DEV_TOOLS src/core/devtools/layer.cpp
               src/core/devtools/layer.h
diff --git a/src/core/libraries/companion/companion_error.h b/src/core/libraries/companion/companion_error.h
new file mode 100644
index 000000000..2d1a3833c
--- /dev/null
+++ b/src/core/libraries/companion/companion_error.h
@@ -0,0 +1,20 @@
+// SPDX-FileCopyrightText: Copyright 2024 shadPS4 Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#pragma once
+
+// companion_httpd error codes
+constexpr int ORBIS_COMPANION_HTTPD_ERROR_UNKNOWN = 0x80E40001;
+constexpr int ORBIS_COMPANION_HTTPD_ERROR_FATAL = 0x80E40002;
+constexpr int ORBIS_COMPANION_HTTPD_ERROR_NOMEM = 0x80E40003;
+constexpr int ORBIS_COMPANION_HTTPD_ERROR_INVALID_PARAM = 0x80E40004;
+constexpr int ORBIS_COMPANION_HTTPD_ERROR_INVALID_OPERATION = 0x80E40005;
+constexpr int ORBIS_COMPANION_HTTPD_ERROR_NOT_INITIALIZED = 0x80E40006;
+constexpr int ORBIS_COMPANION_HTTPD_ERROR_ALREADY_INITIALIZED = 0x80E40007;
+constexpr int ORBIS_COMPANION_HTTPD_ERROR_NO_EVENT = 0x80E40008;
+constexpr int ORBIS_COMPANION_HTTPD_ERROR_NOT_GENERATE_RESPONSE = 0x80E40009;
+constexpr int ORBIS_COMPANION_HTTPD_ERROR_ALREADY_STARTED = 0x80E4000A;
+constexpr int ORBIS_COMPANION_HTTPD_ERROR_NOT_STARTED = 0x80E4000B;
+constexpr int ORBIS_COMPANION_HTTPD_ERROR_ALREADY_REGISTERED = 0x80E4000;
+constexpr int ORBIS_COMPANION_HTTPD_ERROR_NOT_CONNECTED = 0x80E4000D;
+constexpr int ORBIS_COMPANION_HTTPD_ERROR_USER_NOT_FOUND = 0x80E4000E;
diff --git a/src/core/libraries/companion/companion_httpd.cpp b/src/core/libraries/companion/companion_httpd.cpp
index 4a67b9b2f..39081fa4e 100644
--- a/src/core/libraries/companion/companion_httpd.cpp
+++ b/src/core/libraries/companion/companion_httpd.cpp
@@ -2,6 +2,7 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
 
 #include "common/logging/log.h"
+#include "companion_error.h"
 #include "core/libraries/companion/companion_httpd.h"
 #include "core/libraries/error_codes.h"
 #include "core/libraries/libs.h"
@@ -21,9 +22,9 @@ sceCompanionHttpdGet2ndScreenStatus(Libraries::UserService::OrbisUserServiceUser
 }
 
 s32 PS4_SYSV_ABI sceCompanionHttpdGetEvent(OrbisCompanionHttpdEvent* pEvent) {
-    pEvent->event = 0x10000002; // disconnected
+    pEvent->event = ORBIS_COMPANION_HTTPD_EVENT_DISCONNECT; // disconnected
     LOG_DEBUG(Lib_CompanionHttpd, "device disconnected");
-    return 0x80E40008; // No events to obtain
+    return ORBIS_COMPANION_HTTPD_ERROR_NO_EVENT; // No events to obtain
 }
 
 s32 PS4_SYSV_ABI
diff --git a/src/core/libraries/companion/companion_httpd.h b/src/core/libraries/companion/companion_httpd.h
index 1b0ffc2cd..b6d441653 100644
--- a/src/core/libraries/companion/companion_httpd.h
+++ b/src/core/libraries/companion/companion_httpd.h
@@ -13,6 +13,10 @@ class SymbolsResolver;
 
 namespace Libraries::CompanionHttpd {
 
+// OrbisCompanionHttpdEvent event codes
+constexpr int ORBIS_COMPANION_HTTPD_EVENT_CONNECT = 0x10000001;
+constexpr int ORBIS_COMPANION_HTTPD_EVENT_DISCONNECT = 0x10000002;
+
 struct OrbisCompanionHttpdHeader {
     char* key;
     char* value;