diff --git a/sdk/include/crt/_mingw.h b/sdk/include/crt/_mingw.h
index a0da23de0f2..99030d543e4 100644
--- a/sdk/include/crt/_mingw.h
+++ b/sdk/include/crt/_mingw.h
@@ -185,9 +185,6 @@ allow GCC to optimize away some EH unwind code, at least in DW2 case.  */
 #define __int16 short
 #define __int32 int
 #define __int64 long long
-#ifdef _WIN64
-   typedef int __int128 __attribute__ ((mode (TI)));
-# endif
 # define __ptr32
 # define __ptr64
 # ifdef __cplusplus