diff --git a/src/burner/libretro/tchar.h b/src/burner/libretro/tchar.h
index 1dc049b..91b2d97 100644
--- a/src/burner/libretro/tchar.h
+++ b/src/burner/libretro/tchar.h
@@ -57,6 +57,11 @@
 #ifndef FASTCALL
 	#undef __fastcall
 	#define __fastcall
+#else
+#ifndef _MSC_VER
+	#undef __fastcall
+	#define __fastcall __attribute__((fastcall))
+#endif
 #endif
 
 #define ANSIToTCHAR(str, foo, bar) (str)