diff --git a/src/catch2/internal/catch_compiler_capabilities.hpp b/src/catch2/internal/catch_compiler_capabilities.hpp
index 2f9ee339..67611863 100644
--- a/src/catch2/internal/catch_compiler_capabilities.hpp
+++ b/src/catch2/internal/catch_compiler_capabilities.hpp
@@ -156,7 +156,7 @@
 
 ////////////////////////////////////////////////////////////////////////////////
 // Visual C++
-#if defined(CATCH_COMPILER_MSC)
+#if defined(CATCH_COMPILER_MSVC)
 
 #  define CATCH_INTERNAL_START_WARNINGS_SUPPRESSION __pragma( warning(push) )
 #  define CATCH_INTERNAL_STOP_WARNINGS_SUPPRESSION  __pragma( warning(pop) )
diff --git a/src/catch2/internal/catch_compiler_detections.hpp b/src/catch2/internal/catch_compiler_detections.hpp
index f30bc446..717f1c36 100644
--- a/src/catch2/internal/catch_compiler_detections.hpp
+++ b/src/catch2/internal/catch_compiler_detections.hpp
@@ -16,7 +16,7 @@
 #endif
 
 #if defined(_MSC_VER) && !defined(__clang__)
-#define CATCH_COMPILER_MSC
+#define CATCH_COMPILER_MSVC
 #endif
 
 #if defined(__MINGW32__)
diff --git a/src/catch2/internal/catch_config_uncaught_exceptions.hpp b/src/catch2/internal/catch_config_uncaught_exceptions.hpp
index d3dc37a1..2f623246 100644
--- a/src/catch2/internal/catch_config_uncaught_exceptions.hpp
+++ b/src/catch2/internal/catch_config_uncaught_exceptions.hpp
@@ -19,7 +19,7 @@
 
 #include <catch2/internal/catch_compiler_detections.hpp>
 
-#if defined(CATCH_COMPILER_MSC)
+#if defined(CATCH_COMPILER_MSVC)
 #  if _MSC_VER >= 1900 // Visual Studio 2015 or newer
 #    define CATCH_INTERNAL_CONFIG_CPP17_UNCAUGHT_EXCEPTIONS
 #  endif
diff --git a/src/catch2/internal/catch_container_nonmembers.hpp b/src/catch2/internal/catch_container_nonmembers.hpp
index 7e9f8c12..6af00e0d 100644
--- a/src/catch2/internal/catch_container_nonmembers.hpp
+++ b/src/catch2/internal/catch_container_nonmembers.hpp
@@ -18,7 +18,7 @@
 // for C++14 or C++ libraries with incomplete support.
 // We also have to handle that MSVC std lib will happily provide these
 // under older standards.
-#if defined(CATCH_CPP17_OR_GREATER) || defined(CATCH_COMPILER_MSC)
+#if defined(CATCH_CPP17_OR_GREATER) || defined(CATCH_COMPILER_MSVC)
 
 // We are already using this header either way, so there shouldn't
 // be much additional overhead in including it to get the feature
diff --git a/src/catch2/internal/catch_debugger.cpp b/src/catch2/internal/catch_debugger.cpp
index f55adbce..9934dc08 100644
--- a/src/catch2/internal/catch_debugger.cpp
+++ b/src/catch2/internal/catch_debugger.cpp
@@ -101,7 +101,7 @@
             return false;
         }
     } // namespace Catch
-#elif defined(CATCH_COMPILER_MSC)
+#elif defined(CATCH_COMPILER_MSVC)
     extern "C" __declspec(dllimport) int __stdcall IsDebuggerPresent();
     namespace Catch {
         bool isDebuggerActive() {
diff --git a/src/catch2/internal/catch_debugger.hpp b/src/catch2/internal/catch_debugger.hpp
index e89756f0..d880bc7b 100644
--- a/src/catch2/internal/catch_debugger.hpp
+++ b/src/catch2/internal/catch_debugger.hpp
@@ -47,7 +47,7 @@ namespace Catch {
 
         #define CATCH_TRAP() raise(SIGTRAP)
     #endif
-#elif defined(CATCH_COMPILER_MSC)
+#elif defined(CATCH_COMPILER_MSVC)
     #define CATCH_TRAP() __debugbreak()
 #elif defined(CATCH_COMPILER_MINGW32)
     extern "C" __declspec(dllimport) void __stdcall DebugBreak();
diff --git a/src/catch2/internal/catch_decomposer.hpp b/src/catch2/internal/catch_decomposer.hpp
index 73772ec6..7546322c 100644
--- a/src/catch2/internal/catch_decomposer.hpp
+++ b/src/catch2/internal/catch_decomposer.hpp
@@ -15,7 +15,7 @@
 
 #include <iosfwd>
 
-#ifdef CATCH_COMPILER_MSC
+#ifdef CATCH_COMPILER_MSVC
 #pragma warning(push)
 #pragma warning(disable:4389) // '==' : signed/unsigned mismatch
 #pragma warning(disable:4018) // more "signed/unsigned mismatch"
@@ -257,7 +257,7 @@ namespace Catch {
 
 } // end namespace Catch
 
-#ifdef CATCH_COMPILER_MSC
+#ifdef CATCH_COMPILER_MSVC
 #pragma warning(pop)
 #endif
 #ifdef CATCH_COMPILER_CLANG
diff --git a/src/catch2/internal/catch_output_redirect.cpp b/src/catch2/internal/catch_output_redirect.cpp
index 6d1569a6..2ea69206 100644
--- a/src/catch2/internal/catch_output_redirect.cpp
+++ b/src/catch2/internal/catch_output_redirect.cpp
@@ -16,7 +16,7 @@
 #include <sstream>
 
 #if defined(CATCH_CONFIG_NEW_CAPTURE)
-    #if defined(CATCH_COMPILER_MSC)
+    #if defined(CATCH_COMPILER_MSVC)
     #include <io.h>      //_dup and _dup2
     #define dup _dup
     #define dup2 _dup2
@@ -62,7 +62,7 @@ namespace Catch {
 
 #if defined(CATCH_CONFIG_NEW_CAPTURE)
 
-#if defined(CATCH_COMPILER_MSC)
+#if defined(CATCH_COMPILER_MSVC)
     TempFile::TempFile() {
         if (tmpnam_s(m_buffer)) {
             CATCH_RUNTIME_ERROR("Could not get a temp filename");
@@ -90,7 +90,7 @@ namespace Catch {
          std::fclose(m_file);
          // We manually create the file on Windows only, on Linux
          // it will be autodeleted
-#if defined(CATCH_COMPILER_MSC)
+#if defined(CATCH_COMPILER_MSVC)
          std::remove(m_buffer);
 #endif
     }
@@ -140,7 +140,7 @@ namespace Catch {
 } // namespace Catch
 
 #if defined(CATCH_CONFIG_NEW_CAPTURE)
-    #if defined(CATCH_COMPILER_MSC)
+    #if defined(CATCH_COMPILER_MSVC)
     #undef dup
     #undef dup2
     #undef fileno
diff --git a/src/catch2/internal/catch_output_redirect.hpp b/src/catch2/internal/catch_output_redirect.hpp
index 2eaa0135..2654e5eb 100644
--- a/src/catch2/internal/catch_output_redirect.hpp
+++ b/src/catch2/internal/catch_output_redirect.hpp
@@ -86,7 +86,7 @@ namespace Catch {
 
     private:
         std::FILE* m_file = nullptr;
-    #if defined(CATCH_COMPILER_MSC)
+    #if defined(CATCH_COMPILER_MSVC)
         char m_buffer[L_tmpnam] = { 0 };
     #endif
     };
diff --git a/src/catch2/internal/catch_platform.hpp b/src/catch2/internal/catch_platform.hpp
index ba723765..fe56141e 100644
--- a/src/catch2/internal/catch_platform.hpp
+++ b/src/catch2/internal/catch_platform.hpp
@@ -24,7 +24,7 @@
 #elif defined(linux) || defined(__linux) || defined(__linux__)
 #  define CATCH_PLATFORM_LINUX
 
-#elif defined(WIN32) || defined(__WIN32__) || defined(_WIN32) || defined(CATCH_COMPILER_MSC) || defined(CATCH_COMPILER_MINGW32)
+#elif defined(WIN32) || defined(__WIN32__) || defined(_WIN32) || defined(CATCH_COMPILER_MSVC) || defined(CATCH_COMPILER_MINGW32)
 #  define CATCH_PLATFORM_WINDOWS
 #endif
 
diff --git a/src/catch2/internal/catch_random_number_generator.cpp b/src/catch2/internal/catch_random_number_generator.cpp
index 75d91e38..0fa71fb0 100644
--- a/src/catch2/internal/catch_random_number_generator.cpp
+++ b/src/catch2/internal/catch_random_number_generator.cpp
@@ -13,7 +13,7 @@ namespace Catch {
 
 namespace {
 
-#if defined(CATCH_COMPILER_MSC)
+#if defined(CATCH_COMPILER_MSVC)
 #pragma warning(push)
 #pragma warning(disable:4146) // we negate uint32 during the rotate
 #endif
@@ -24,7 +24,7 @@ namespace {
             return (val >> count) | (val << (-count & mask));
         }
 
-#if defined(CATCH_COMPILER_MSC)
+#if defined(CATCH_COMPILER_MSVC)
 #pragma warning(pop)
 #endif
 
diff --git a/src/catch2/internal/catch_test_spec_parser.hpp b/src/catch2/internal/catch_test_spec_parser.hpp
index b4a52f85..d7f235c3 100644
--- a/src/catch2/internal/catch_test_spec_parser.hpp
+++ b/src/catch2/internal/catch_test_spec_parser.hpp
@@ -8,12 +8,13 @@
 #ifndef CATCH_TEST_SPEC_PARSER_HPP_INCLUDED
 #define CATCH_TEST_SPEC_PARSER_HPP_INCLUDED
 
+#include <catch2/internal/catch_compiler_detections.hpp>
+
 #ifdef CATCH_COMPILER_CLANG
 #pragma clang diagnostic push
 #pragma clang diagnostic ignored "-Wpadded"
 #endif
 
-#include <catch2/internal/catch_compiler_detections.hpp>
 #include <catch2/catch_test_spec.hpp>
 
 #include <vector>