diff --git a/sdk/include/crt/stdio.h b/sdk/include/crt/stdio.h
index f740a22ea40..31fa203084e 100644
--- a/sdk/include/crt/stdio.h
+++ b/sdk/include/crt/stdio.h
@@ -885,7 +885,7 @@ extern _CRTIMP int _commode;
     _In_z_ _Printf_format_string_ const wchar_t *_Format,
     va_list _ArgList);
 
-#if defined __cplusplus || defined _CRT_NON_CONFORMING_SWPRINTFS
+#if defined _CRT_NON_CONFORMING_SWPRINTFS
   _Check_return_opt_
   _CRTIMP
   int
diff --git a/sdk/include/crt/wchar.h b/sdk/include/crt/wchar.h
index b4930959ce6..bdb985322b4 100644
--- a/sdk/include/crt/wchar.h
+++ b/sdk/include/crt/wchar.h
@@ -1074,7 +1074,7 @@ _CRTIMP int __cdecl iswblank(wint_t _C);
     _In_z_ _Printf_format_string_ const wchar_t *_Format,
     va_list _ArgList);
 
-#if defined __cplusplus || defined _CRT_NON_CONFORMING_SWPRINTFS
+#if defined _CRT_NON_CONFORMING_SWPRINTFS
   _CRTIMP
   int
   __cdecl