diff --git a/include/cstring b/include/cstring
index 13bb1189..45075b3a 100644
--- a/include/cstring
+++ b/include/cstring
@@ -94,7 +94,7 @@ using ::strspn;
 using ::strstr;
 
 // MSVC, GNU libc and its derivates already have the correct prototype in <string.h> #ifdef __cplusplus
-#if !defined(__GLIBC__) && !defined(_MSC_VER) && !defined(__sun__)
+#if !defined(__GLIBC__) && !defined(_MSC_VER) && !defined(__sun__) && !defined(_STRING_H_CPLUSPLUS_98_CONFORMANCE_)
 inline _LIBCPP_INLINE_VISIBILITY       char* strchr(      char* __s, int __c) {return ::strchr(__s, __c);}
 inline _LIBCPP_INLINE_VISIBILITY       char* strpbrk(      char* __s1, const char* __s2) {return ::strpbrk(__s1, __s2);}
 inline _LIBCPP_INLINE_VISIBILITY       char* strrchr(      char* __s, int __c) {return ::strrchr(__s, __c);}
diff --git a/include/cwchar b/include/cwchar
index caed08de..845ccec3 100644
--- a/include/cwchar
+++ b/include/cwchar
@@ -167,28 +167,37 @@ using ::wcscoll;
 using ::wcsncmp;
 using ::wcsxfrm;
 
+#if defined(_WCHAR_H_CPLUSPLUS_98_CONFORMANCE_)
+
+using ::wcschr;
+using ::wcspbrk;
+using ::wcsrchr;
+using ::wcsstr;
+using ::wmemchr;
+
+#else
+
 inline _LIBCPP_INLINE_VISIBILITY const wchar_t* wcschr(const wchar_t* __s, wchar_t __c) {return ::wcschr(__s, __c);}
 inline _LIBCPP_INLINE_VISIBILITY       wchar_t* wcschr(      wchar_t* __s, wchar_t __c) {return ::wcschr(__s, __c);}
 
-using ::wcscspn;
-using ::wcslen;
-
 inline _LIBCPP_INLINE_VISIBILITY const wchar_t* wcspbrk(const wchar_t* __s1, const wchar_t* __s2) {return ::wcspbrk(__s1, __s2);}
 inline _LIBCPP_INLINE_VISIBILITY       wchar_t* wcspbrk(      wchar_t* __s1, const wchar_t* __s2) {return ::wcspbrk(__s1, __s2);}
 
 inline _LIBCPP_INLINE_VISIBILITY const wchar_t* wcsrchr(const wchar_t* __s, wchar_t __c) {return ::wcsrchr(__s, __c);}
 inline _LIBCPP_INLINE_VISIBILITY       wchar_t* wcsrchr(      wchar_t* __s, wchar_t __c) {return ::wcsrchr(__s, __c);}
 
-using ::wcsspn;
-
 inline _LIBCPP_INLINE_VISIBILITY const wchar_t* wcsstr(const wchar_t* __s1, const wchar_t* __s2) {return ::wcsstr(__s1, __s2);}
 inline _LIBCPP_INLINE_VISIBILITY       wchar_t* wcsstr(      wchar_t* __s1, const wchar_t* __s2) {return ::wcsstr(__s1, __s2);}
 
-using ::wcstok;
-
 inline _LIBCPP_INLINE_VISIBILITY const wchar_t* wmemchr(const wchar_t* __s, wchar_t __c, size_t __n) {return ::wmemchr(__s, __c, __n);}
 inline _LIBCPP_INLINE_VISIBILITY       wchar_t* wmemchr(      wchar_t* __s, wchar_t __c, size_t __n) {return ::wmemchr(__s, __c, __n);}
 
+#endif
+
+using ::wcscspn;
+using ::wcslen;
+using ::wcsspn;
+using ::wcstok;
 using ::wmemcmp;
 using ::wmemcpy;
 using ::wmemmove;