---- a/libc/sysdeps/linux/common/bits/mathcalls.h
-+++ b/libc/sysdeps/linux/common/bits/mathcalls.h
-@@ -237,8 +237,7 @@ __END_NAMESPACE_C99
-
-
- /* Return nonzero if VALUE is not a number. */
--/* DELETE? __MATHDECL_PRIV adds another "__": so this is "____isnan"???! */
--/*__MATHDECL_PRIV (int,__isnan,, (_Mdouble_ __value), (__const__))*/
-+__MATHDECL_PRIV (int,isnan,, (_Mdouble_ __value), (__const__));
-
- #if defined __USE_MISC || defined __USE_XOPEN
- /* Return nonzero if VALUE is not a number. */