diff --git a/newlib/src/newlib/libc/include/sys/config.h b/newlib/src/newlib/libc/include/sys/config.h
index 49c81f91..9aa4cd0c 100644
--- a/newlib/src/newlib/libc/include/sys/config.h
+++ b/newlib/src/newlib/libc/include/sys/config.h
@@ -86,9 +86,9 @@
 #define HAVE_GETDATE
 #define _HAVE_SYSTYPES
 #define _READ_WRITE_RETURN_TYPE _ssize_t
-#define __LARGE64_FILES 1
+/*#define __LARGE64_FILES 1*/
 /* we use some glibc header files so turn on glibc large file feature */
-#define _LARGEFILE64_SOURCE 1
+/*#define _LARGEFILE64_SOURCE 1*/
 #endif
 #endif