1 files changed, 57 insertions, 0 deletions
diff --git a/libcxx/include/cctype b/libcxx/include/cctype
index a68c2a06604..7fc81344696 100644
--- a/libcxx/include/cctype
+++ b/libcxx/include/cctype
@@ -44,6 +44,63 @@ int toupper(int c);
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
+#ifdef isalnum
+#undef isalnum
+#endif
+
+#ifdef isalpha
+#undef isalpha
+#endif
+
+#ifdef isblank
+#undef isblank
+#endif
+
+#ifdef iscntrl
+#undef iscntrl
+#endif
+
+#ifdef isdigit
+#undef isdigit
+#endif
+
+#ifdef isgraph
+#undef isgraph
+#endif
+
+#ifdef islower
+#undef islower
+#endif
+
+#ifdef isprint
+#undef isprint
+#endif
+
+#ifdef ispunct
+#undef ispunct
+#endif
+
+#ifdef isspace
+#undef isspace
+#endif
+
+#ifdef isupper
+#undef isupper
+#endif
+
+#ifdef isxdigit
+#undef isxdigit
+#endif
+
+#ifdef tolower
+#undef tolower
+#endif
+
+#ifdef toupper
+#undef toupper
+#endif
+
+
 using ::isalnum;
 using ::isalpha;
 using ::isblank;