diff --git a/include/wx/defs.h b/include/wx/defs.h
index 1a35a67ba7..02eae35116 100644
--- a/include/wx/defs.h
+++ b/include/wx/defs.h
@@ -1083,7 +1083,7 @@ typedef wxUint32 wxDword;
     #define wxLongLong_t __int64
     #define wxLongLongSuffix i64
     #define wxLongLongFmtSpec "L"
-#elif defined(__MINGW32__)
+#elif defined(__MINGW32__) && (__USE_MINGW_ANSI_STDIO != 1)
     #define wxLongLong_t long long
     #define wxLongLongSuffix ll
     #define wxLongLongFmtSpec "I64"