diff --git a/desmume/src/types.h b/desmume/src/types.h
index 410eebcb2..d2b67197b 100644
--- a/desmume/src/types.h
+++ b/desmume/src/types.h
@@ -118,7 +118,7 @@
 #ifndef FASTCALL
 #ifdef __MINGW32__
 #define FASTCALL __attribute__((fastcall))
-#elif defined (__i386__)
+#elif defined (__i386__) && !defined(__clang__)
 #define FASTCALL __attribute__((regparm(3)))
 #elif defined(_MSC_VER) || defined(__INTEL_COMPILER)
 #define FASTCALL