diff --git a/CMakeLists.txt b/CMakeLists.txt
index a967c540..657b7c5b 100755
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -276,6 +276,7 @@ set(SYSTEM_LIBS src/core/libraries/system/commondialog.cpp
                 src/core/libraries/save_data/dialog/savedatadialog_ui.h
                 src/core/libraries/system/sysmodule.cpp
                 src/core/libraries/system/sysmodule.h
+                src/core/libraries/system/system_error.h
                 src/core/libraries/system/systemservice.cpp
                 src/core/libraries/system/systemservice.h
                 src/core/libraries/system/userservice.cpp
diff --git a/src/core/libraries/system/sysmodule.cpp b/src/core/libraries/system/sysmodule.cpp
index d37c375b..8ea61e17 100644
--- a/src/core/libraries/system/sysmodule.cpp
+++ b/src/core/libraries/system/sysmodule.cpp
@@ -9,6 +9,7 @@
 #include "core/libraries/error_codes.h"
 #include "core/libraries/libs.h"
 #include "core/libraries/system/sysmodule.h"
+#include "core/libraries/system/system_error.h"
 
 namespace Libraries::SysModule {
 
@@ -34,11 +35,23 @@ int PS4_SYSV_ABI sceSysmoduleIsCameraPreloaded() {
 
 int PS4_SYSV_ABI sceSysmoduleIsLoaded(OrbisSysModule id) {
     LOG_ERROR(Lib_SysModule, "(DUMMY) called module = {}", magic_enum::enum_name(id));
+    if (static_cast<u16>(id) == 0) {
+        LOG_ERROR(Lib_SysModule, "Invalid sysmodule ID: {:#x}", static_cast<u16>(id));
+        return ORBIS_SYSMODULE_INVALID_ID;
+    }
     return ORBIS_OK;
 }
 
-int PS4_SYSV_ABI sceSysmoduleIsLoadedInternal() {
-    LOG_ERROR(Lib_SysModule, "(STUBBED) called");
+int PS4_SYSV_ABI sceSysmoduleIsLoadedInternal(OrbisSysModuleInternal id) {
+    LOG_ERROR(Lib_SysModule, "(DUMMY) called module = {:#x}", static_cast<u32>(id));
+    if ((static_cast<u32>(id) & 0x7FFFFFFF) == 0) {
+        LOG_ERROR(Lib_SysModule, "Invalid internal sysmodule ID: {:#x}", static_cast<u32>(id));
+        return ORBIS_SYSMODULE_INVALID_ID;
+    }
+    if (id == OrbisSysModuleInternal::ORBIS_SYSMODULE_INTERNAL_RAZOR_CPU) {
+        // Internal debugging library, report as not loaded so it won't be used.
+        return ORBIS_SYSMODULE_NOT_LOADED;
+    }
     return ORBIS_OK;
 }
 
diff --git a/src/core/libraries/system/sysmodule.h b/src/core/libraries/system/sysmodule.h
index c9ec97ce..3630fb58 100644
--- a/src/core/libraries/system/sysmodule.h
+++ b/src/core/libraries/system/sysmodule.h
@@ -147,12 +147,16 @@ enum class OrbisSysModule : u16 {
     ORBIS_SYSMODULE_KEYBOARD = 0x0106,
 };
 
+enum class OrbisSysModuleInternal : u32 {
+    ORBIS_SYSMODULE_INTERNAL_RAZOR_CPU = 0x80000019, // libSceRazorCpu.sprx
+};
+
 int PS4_SYSV_ABI sceSysmoduleGetModuleHandleInternal();
 int PS4_SYSV_ABI sceSysmoduleGetModuleInfoForUnwind();
 int PS4_SYSV_ABI sceSysmoduleIsCalledFromSysModule();
 int PS4_SYSV_ABI sceSysmoduleIsCameraPreloaded();
 int PS4_SYSV_ABI sceSysmoduleIsLoaded(OrbisSysModule id);
-int PS4_SYSV_ABI sceSysmoduleIsLoadedInternal();
+int PS4_SYSV_ABI sceSysmoduleIsLoadedInternal(OrbisSysModuleInternal id);
 int PS4_SYSV_ABI sceSysmoduleLoadModule(OrbisSysModule id);
 int PS4_SYSV_ABI sceSysmoduleLoadModuleByNameInternal();
 int PS4_SYSV_ABI sceSysmoduleLoadModuleInternal();
diff --git a/src/core/libraries/system/system_error.h b/src/core/libraries/system/system_error.h
new file mode 100644
index 00000000..615e4cd5
--- /dev/null
+++ b/src/core/libraries/system/system_error.h
@@ -0,0 +1,8 @@
+// SPDX-FileCopyrightText: Copyright 2024 shadPS4 Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#pragma once
+
+constexpr int ORBIS_SYSMODULE_INVALID_ID = 0x805A1000;
+constexpr int ORBIS_SYSMODULE_NOT_LOADED = 0x805A1001;
+constexpr int ORBIS_SYSMODULE_LOCK_FAILED = 0x805A10FF;
\ No newline at end of file
diff --git a/src/emulator.cpp b/src/emulator.cpp
index c0b01229..27291707 100644
--- a/src/emulator.cpp
+++ b/src/emulator.cpp
@@ -269,7 +269,7 @@ void Emulator::Run(const std::filesystem::path& file) {
 }
 
 void Emulator::LoadSystemModules(const std::filesystem::path& file, std::string game_serial) {
-    constexpr std::array<SysModules, 11> ModulesToLoad{
+    constexpr std::array<SysModules, 10> ModulesToLoad{
         {{"libSceNgs2.sprx", &Libraries::Ngs2::RegisterlibSceNgs2},
          {"libSceFiber.sprx", &Libraries::Fiber::RegisterlibSceFiber},
          {"libSceUlt.sprx", nullptr},
@@ -279,7 +279,6 @@ void Emulator::LoadSystemModules(const std::filesystem::path& file, std::string
          {"libSceDiscMap.sprx", &Libraries::DiscMap::RegisterlibSceDiscMap},
          {"libSceRtc.sprx", &Libraries::Rtc::RegisterlibSceRtc},
          {"libSceJpegEnc.sprx", nullptr},
-         {"libSceRazorCpu.sprx", nullptr},
          {"libSceCesCs.sprx", nullptr}}};
 
     std::vector<std::filesystem::path> found_modules;