diff --git a/src/catch2/internal/catch_main.cpp b/src/catch2/internal/catch_main.cpp
index ed89ab6e..f523bbfa 100644
--- a/src/catch2/internal/catch_main.cpp
+++ b/src/catch2/internal/catch_main.cpp
@@ -18,6 +18,9 @@ namespace Catch {
     CATCH_INTERNAL_STOP_WARNINGS_SUPPRESSION
 }
 
+// Allow users of amalgamated .cpp file to remove our main and provide their own.
+#if !defined(CATCH_AMALGAMATED_CUSTOM_MAIN)
+
 #if defined(CATCH_CONFIG_WCHAR) && defined(CATCH_PLATFORM_WINDOWS) && defined(_UNICODE) && !defined(DO_NOT_USE_WMAIN)
 // Standard C/C++ Win32 Unicode wmain entry point
 extern "C" int __cdecl wmain (int argc, wchar_t * argv[], wchar_t * []) {
@@ -32,3 +35,5 @@ int main (int argc, char * argv[]) {
 
     return Catch::Session().run( argc, argv );
 }
+
+#endif // !defined(CATCH_AMALGAMATED_CUSTOM_MAIN