diff --git a/reactos/include/crt/_mingw.h b/reactos/include/crt/_mingw.h
index d4e53ff435a..cff811248d8 100644
--- a/reactos/include/crt/_mingw.h
+++ b/reactos/include/crt/_mingw.h
@@ -157,10 +157,12 @@ allow GCC to optimize away some EH unwind code, at least in DW2 case.  */
 //#endif
 
 #ifdef __GNUC__
+#ifndef __clang__
 #define __int8 char
 #define __int16 short
 #define __int32 int
 #define __int64 long long
+#endif
 #ifdef _WIN64
    typedef int __int128 __attribute__ ((mode (TI)));
 # endif