diff --git a/mingw-w64-headers/crt/sec_api/string_s.h b/mingw-w64-headers/crt/sec_api/string_s.h
index 63f5090..2fcf8c0 100644
--- a/mingw-w64-headers/crt/sec_api/string_s.h
+++ b/mingw-w64-headers/crt/sec_api/string_s.h
@@ -28,8 +28,6 @@
   _CRTIMP errno_t __cdecl _strncpy_s_l(char *_Dst,size_t _DstSizeInChars,const char *_Src,size_t _MaxCount,_locale_t _Locale);
   _CRTIMP char *__cdecl strtok_s(char *_Str,const char *_Delim,char **_Context);
   _CRTIMP char *__cdecl _strtok_s_l(char *_Str,const char *_Delim,char **_Context,_locale_t _Locale);
-  _CRTIMP errno_t __cdecl _strset_s(char *_Str,size_t _SizeInChars,unsigned int _Val);
-  _CRTIMP errno_t __cdecl _strnset_s(char *_Str,size_t _SizeInChars,unsigned int _Val, size_t _Count);
 
 #ifndef _WSTRING_S_DEFINED
 #define _WSTRING_S_DEFINED