--- Libc/Libc-1698.140.3/include/secure/_stdio.h
+++ Libc/Libc-1669.40.2/include/secure/_stdio.h
@@ -28,10 +28,7 @@
 #ifndef _SECURE__STDIO_H_
 #define _SECURE__STDIO_H_
 
-#include <_bounds.h>
 #include <secure/_common.h>
-
-_LIBC_SINGLE_BY_DEFAULT()
 
 #if _USE_FORTIFY_LEVEL > 0
 
@@ -43,7 +40,7 @@
 #ifndef UNIFDEF_DRIVERKIT
 /* sprintf, vsprintf, snprintf, vsnprintf */
 #if __has_builtin(__builtin___sprintf_chk) || defined(__GNUC__)
-extern int __sprintf_chk (char * __restrict _LIBC_UNSAFE_INDEXABLE, int, size_t,
+extern int __sprintf_chk (char * __restrict, int, size_t,
 			  const char * __restrict, ...);
 
 #undef sprintf
@@ -54,7 +51,7 @@
 
 #if __DARWIN_C_LEVEL >= 200112L
 #if __has_builtin(__builtin___snprintf_chk) || defined(__GNUC__)
-extern int __snprintf_chk (char * __restrict _LIBC_COUNT(__maxlen), size_t __maxlen, int, size_t,
+extern int __snprintf_chk (char * __restrict, size_t, int, size_t,
 			   const char * __restrict, ...);
 
 #undef snprintf
@@ -64,7 +61,7 @@
 
 #ifndef UNIFDEF_DRIVERKIT
 #if __has_builtin(__builtin___vsprintf_chk) || defined(__GNUC__)
-extern int __vsprintf_chk (char * __restrict _LIBC_UNSAFE_INDEXABLE, int, size_t,
+extern int __vsprintf_chk (char * __restrict, int, size_t,
 			   const char * __restrict, va_list);
 
 #undef vsprintf
@@ -74,7 +71,7 @@
 #endif /* UNIFDEF_DRIVERKIT */
 
 #if __has_builtin(__builtin___vsnprintf_chk) || defined(__GNUC__)
-extern int __vsnprintf_chk (char * __restrict _LIBC_COUNT(__maxlen), size_t __maxlen, int, size_t,
+extern int __vsnprintf_chk (char * __restrict, size_t, int, size_t,
 			    const char * __restrict, va_list);
 
 #undef vsnprintf