diff --git a/single_include/catch.hpp b/single_include/catch.hpp
index b3c17a62..3b487bb2 100644
--- a/single_include/catch.hpp
+++ b/single_include/catch.hpp
@@ -968,7 +968,7 @@ namespace Catch
         inline void BreakIntoDebugger(){}
     #endif
 
-#elif defined(CATCH_PLATFORM_WINDOWS)
+#elif defined(_MSC_VER)
     extern "C" __declspec(dllimport) int __stdcall IsDebuggerPresent();
     extern "C" __declspec(dllimport) void __stdcall OutputDebugStringA( const char* );
     #define BreakIntoDebugger() if (IsDebuggerPresent() ) { __debugbreak(); }