diff --git a/mingw-w64-headers/crt/sec_api/stdio_s.h b/mingw-w64-headers/crt/sec_api/stdio_s.h
index b4d6ec1..aa51af7 100644
--- a/mingw-w64-headers/crt/sec_api/stdio_s.h
+++ b/mingw-w64-headers/crt/sec_api/stdio_s.h
@@ -117,7 +117,7 @@
   __DEFINE_CPP_OVERLOAD_SECURE_FUNC_0_3(int,_vsnwprintf_s,wchar_t,_DstBuf,size_t,_MaxCount,const wchar_t*,_Format,va_list,_ArgList)
 
   _CRTIMP int __cdecl _snwprintf_s(wchar_t *_DstBuf,size_t _DstSizeInWords,size_t _MaxCount,const wchar_t *_Format,...);
-  __DEFINE_CPP_OVERLOAD_SECURE_FUNC_0_2_ARGLIST(int,_snwprintf_s,_vsnwprintf_s,wchar_t,_DstBuf,size_t,_MaxCount,const char*,_Format)
+  __DEFINE_CPP_OVERLOAD_SECURE_FUNC_0_2_ARGLIST(int,_snwprintf_s,_vsnwprintf_s,wchar_t,_DstBuf,size_t,_MaxCount,const wchar_t*,_Format)
 
 
   _CRTIMP int __cdecl _wprintf_s_l(const wchar_t *_Format,_locale_t _Locale,...);
diff --git a/mingw-w64-headers/crt/sec_api/wchar_s.h b/mingw-w64-headers/crt/sec_api/wchar_s.h
index 133a17e..fe09632 100644
--- a/mingw-w64-headers/crt/sec_api/wchar_s.h
+++ b/mingw-w64-headers/crt/sec_api/wchar_s.h
@@ -49,7 +49,7 @@
   __DEFINE_CPP_OVERLOAD_SECURE_FUNC_0_3(int,_vsnwprintf_s,wchar_t,_DstBuf,size_t,_MaxCount,const wchar_t*,_Format,va_list,_ArgList)
 
   _CRTIMP int __cdecl _snwprintf_s(wchar_t *_DstBuf,size_t _DstSizeInWords,size_t _MaxCount,const wchar_t *_Format,...);
-  __DEFINE_CPP_OVERLOAD_SECURE_FUNC_0_2_ARGLIST(int,_snwprintf_s,_vsnwprintf_s,wchar_t,_DstBuf,size_t,_MaxCount,const char*,_Format)
+  __DEFINE_CPP_OVERLOAD_SECURE_FUNC_0_2_ARGLIST(int,_snwprintf_s,_vsnwprintf_s,wchar_t,_DstBuf,size_t,_MaxCount,const wchar_t*,_Format)
 
   _CRTIMP int __cdecl _wprintf_s_l(const wchar_t *_Format,_locale_t _Locale,...);
   _CRTIMP int __cdecl _vwprintf_s_l(const wchar_t *_Format,_locale_t _Locale,va_list _ArgList);