diff --git a/src/common.hpp b/src/common.hpp
index 69f17b43..196698bb 100644
--- a/src/common.hpp
+++ b/src/common.hpp
@@ -57,4 +57,10 @@ static FORCE_INLINE constexpr u32 GetVideoFrequency(bool pal) {
 #define BYTE_INDEX(i)   (15 - (i))
 
 #define unlikely(exp) __builtin_expect(exp, 0)
-#define likely(exp) __builtin_expect(exp, 1)
\ No newline at end of file
+#define likely(exp) __builtin_expect(exp, 1)
+
+#if defined(WIN32) || defined(_WIN32) || defined(__WIN32) && !defined(__CYGWIN__)
+#define ABI_WINDOWS
+#else
+#define ABI_UNIX
+#endif
\ No newline at end of file