diff --git a/CHANGELOG.md b/CHANGELOG.md
index 933ec62c..9e932cf0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,6 @@
+# v6.5.3
+- [#1946](https://github.com/xmrig/xmrig/pull/1946) Fixed MSR mod names in JSON API (v6.5.2 affected).
+
 # v6.5.2
 - [#1935](https://github.com/xmrig/xmrig/pull/1935) Separate MSR mod for Zen/Zen2 and Zen3.
 - [#1937](https://github.com/xmrig/xmrig/issues/1937) Print path to existing WinRing0 service without verbose option.
diff --git a/src/backend/cpu/cpu.cmake b/src/backend/cpu/cpu.cmake
index b2efdb03..3894b1c6 100644
--- a/src/backend/cpu/cpu.cmake
+++ b/src/backend/cpu/cpu.cmake
@@ -47,6 +47,7 @@ if (WITH_HWLOC)
         src/backend/cpu/platform/HwlocCpuInfo.h
         )
 elseif (WITH_LIBCPUID)
+    message(WARNING, "libcpuid support is deprecated and will be removed in future versions.")
     set(WITH_HWLOC OFF)
 
     add_subdirectory(src/3rdparty/libcpuid)
diff --git a/src/backend/cpu/interfaces/ICpuInfo.h b/src/backend/cpu/interfaces/ICpuInfo.h
index 57f6185a..9270ca09 100644
--- a/src/backend/cpu/interfaces/ICpuInfo.h
+++ b/src/backend/cpu/interfaces/ICpuInfo.h
@@ -55,6 +55,8 @@ public:
         MSR_MOD_MAX
     };
 
+#   define MSR_NAMES_LIST "none", "ryzen_17h", "ryzen_19h", "intel", "custom"
+
     enum Flag : uint32_t {
         FLAG_AES,
         FLAG_AVX2,
diff --git a/src/backend/cpu/platform/BasicCpuInfo.cpp b/src/backend/cpu/platform/BasicCpuInfo.cpp
index 43dbe1d2..7cf09f8c 100644
--- a/src/backend/cpu/platform/BasicCpuInfo.cpp
+++ b/src/backend/cpu/platform/BasicCpuInfo.cpp
@@ -52,8 +52,16 @@
 namespace xmrig {
 
 
-static const std::array<const char *, ICpuInfo::FLAG_MAX> flagNames     = { "aes", "avx2", "avx512f", "bmi2", "osxsave", "pdpe1gb", "sse2", "ssse3", "sse4.1", "xop", "popcnt", "cat_l3" };
-static const std::array<const char *, ICpuInfo::MSR_MOD_MAX> msrNames   = { "none", "ryzen", "intel", "custom" };
+constexpr size_t kCpuFlagsSize                                  = 12;
+static const std::array<const char *, kCpuFlagsSize> flagNames  = { "aes", "avx2", "avx512f", "bmi2", "osxsave", "pdpe1gb", "sse2", "ssse3", "sse4.1", "xop", "popcnt", "cat_l3" };
+static_assert(kCpuFlagsSize == ICpuInfo::FLAG_MAX, "kCpuFlagsSize and FLAG_MAX mismatch");
+
+
+#ifdef XMRIG_FEATURE_MSR
+constexpr size_t kMsrArraySize                                  = 5;
+static const std::array<const char *, kMsrArraySize> msrNames   = { MSR_NAMES_LIST };
+static_assert(kMsrArraySize == ICpuInfo::MSR_MOD_MAX, "kMsrArraySize and MSR_MOD_MAX mismatch");
+#endif
 
 
 static inline void cpuid(uint32_t level, int32_t output[4])
@@ -344,7 +352,12 @@ rapidjson::Value xmrig::BasicCpuInfo::toJSON(rapidjson::Document &doc) const
     out.AddMember("packages",   static_cast<uint64_t>(packages()), allocator);
     out.AddMember("nodes",      static_cast<uint64_t>(nodes()), allocator);
     out.AddMember("backend",    StringRef(backend()), allocator);
+
+#   ifdef XMRIG_FEATURE_MSR
     out.AddMember("msr",        StringRef(msrNames[msrMod()]), allocator);
+#   else
+    out.AddMember("msr",        "none", allocator);
+#   endif
 
 #   ifdef XMRIG_FEATURE_ASM
     out.AddMember("assembly",   StringRef(Assembly(assembly()).toString()), allocator);
diff --git a/src/crypto/rx/RxConfig.cpp b/src/crypto/rx/RxConfig.cpp
index 43e21a89..c501e712 100644
--- a/src/crypto/rx/RxConfig.cpp
+++ b/src/crypto/rx/RxConfig.cpp
@@ -74,7 +74,7 @@ static const std::array<MsrItems, kMsrArraySize> msrPresets = {
     MsrItems()
 };
 
-static const std::array<const char *, kMsrArraySize> modNames = { "none", "ryzen_17h", "ryzen_19h", "intel", "custom" };
+static const std::array<const char *, kMsrArraySize> modNames = { MSR_NAMES_LIST };
 
 static_assert (kMsrArraySize == ICpuInfo::MSR_MOD_MAX, "kMsrArraySize and MSR_MOD_MAX mismatch");
 #endif
diff --git a/src/version.h b/src/version.h
index 85c28eda..d716814f 100644
--- a/src/version.h
+++ b/src/version.h
@@ -28,7 +28,7 @@
 #define APP_ID        "xmrig"
 #define APP_NAME      "XMRig"
 #define APP_DESC      "XMRig miner"
-#define APP_VERSION   "6.5.2"
+#define APP_VERSION   "6.5.3-dev"
 #define APP_DOMAIN    "xmrig.com"
 #define APP_SITE      "www.xmrig.com"
 #define APP_COPYRIGHT "Copyright (C) 2016-2020 xmrig.com"
@@ -36,7 +36,7 @@
 
 #define APP_VER_MAJOR  6
 #define APP_VER_MINOR  5
-#define APP_VER_PATCH  2
+#define APP_VER_PATCH  3
 
 #ifdef _MSC_VER
 #   if (_MSC_VER >= 1920)